Oxus America — Hazardous Materials Safety Interpretation

Page 1U.S. Department of Transportation Washington, DC 20590 1200 New Jersey Avenue SE Pipeline and Hazardous Materials Safety Administration SEP 1 5 2015 Mr. Ryan Lenaric Quality Manager Oxus America 2676 Paldan Drive Auburn Hills, MI 48326 Ref. No. 15-0111 Dear Mr. Lenaric: This responds to your June 8, 2015 email requesting clarification of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) applicable to a portable oxygen concentrator (POC). Specifically, you inquire about obtaining approval from the Federal Aviation Administration (FAA) to allow a passenger to carry and operate the Model Number RS-00500 POC onboard an aircraft. According to your letter, the POC noted above is for oxygen delivery to patients who require ambulatory supplemental oxygen therapy and is comprised of the same technology as your previously approved Model Number RS-00400 POC. The maximum operating pressure of the Model Number RS-00500 POC is 20.5 pounds per square inch (psig). The POC is capable of operation from AC or external DC power sources as well as a lithium ion battery pack. The battery pack has a Watt-hour (Wh) rating of 97 (2.2 ampere-hour (Ah) x 3.6 volts (V) x 12 cells). The lithium ion battery pack meets the appropriate testing requirements of the UN Manual of Tests and Criteria, and the battery pack is packaged in a manner to prevent short circuits when offered for transport or carried onboard an aircraft. You ask whether the Model Number RS-00500 POC is authorized under the HMR to be carried onboard an aircraft Based on the information provided, the Oxus America Model Number RS-00500 POC is not subject to the HMR as a Division 2.2 non-flammable gas. Furthermore, the lithium ion battery pack conforms to § 175.10(a)(18), excluding lithium ion batteries with a Wh rating between 100 and 160 Wh that require operator approval; and the Oxus America Model Number RS-00500 POC contains no other hazardous materials. Therefore, the Oxus America Model Number RS-00500 POC is allowed to be transported by passengers in accordance with the HMR. Please note that notwithstanding the passenger exception in § 175.10(a)(18) of the HMR, the provisions of Special Federal Aviation Regulation (SFAR) 106 apply and are under the purview of the FAA. This response satisfies only one requirement in the FAA approval#

Page 2process before a POC may be operated onboard an aircraft. You may contact Ms. DK Deaderick in FAA's Flight Standards Service at (202) 267-7480 for questions regarding FAA's approval process. I trust this satisfies your inquiry. Please contact us if we can be of further assistance. Sincerely, Dite No. Jake Dirk Der Kinderen Acting Chief, Standards Development Branch Standards and Rulemaking Division#

Page 3boothe 175.10(a)(18) Goodall, Shante CTR (PHMSA) Seceptions From: 15 0111 Sent: Geller, Shelby CTR (PHMSA) To: Monday, June 08, 2015 4:44 PM Hazmat Interps. Subject: Attachments: FW: Interpretation Request Letter (HMR; 49 CFR Parts 171-180) PHMSA Letter Request 060815.pdf; DM-01005317_ATTACHMENT.pdf Hi Shante and Alice, Forwarded is a request for a formal letter of interpretation. Thanks, Shelby From: Ryan Lenarcic [mailto:rlenarcic@oxusamerica.com] To: PHMSA HM InfoCenter Sent: Monday, June 08, 2015 10:21 AM Cc: Gary Abusamra Subject: Interpretation Request Letter (HMR; 49 CFR Parts 171-180) Dear PHMSA Office of Hazardous Materials and Standards: Please find attached our interpretation request letter and supplemental documentation regarding the applicability of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) specifically pertaining to Oxus Model Number RS- 00500 POC and its battery pack. We look forward to your response, thank you. Ryan Lenarcic Oxus Quality Manager Oxus, Inc Toll Free : 888-475-1568 Office: 248-475-0925 Mobile : 248-709-0490 rlenarcic@oxusamerica.com www.oxusamerica.com 1#

Page 4• Oxus America 2676 Paldan Dr Auburn Hills, MI 48326 Oxus Tel 248-475-0925 Fax 248-475-0938 rlenarcic@oxusamerica.com www.oxusamerica.com JUNE 8, 2015 PHMSA Office of Hazardous Materials Standards Attn: PHH-10 East Building 1200 New Jersey Avenue, SE. Washington, DC 20590-0001 Dear PHMSA Office of Hazardous Materials and Standards: Oxus is preparing to enter the market with a new version of our Portable Oxygen Concentrator (POC) and is requesting an amendment to § 175.10(a)(18) of the HMR, Special Federal Aviation Regulation 106, "Rules for Use of Portable Oxygen Concentrator Systems on Board Aircraft" (SFAR 106). This amendment would include the Oxus Model Number RS-00500 POC in the list of approved POC's for use on board aircraft. SFAR 106 permits passengers to carry on and use certain POC's on board aircraft if the aircraft operator ensures that the conditions specified in the SFAR for their use are met. Section 2 of SFAR 106 requires that PHMSA determine that the POC does not contain hazardous materials and that the requestor includes this determination in the SFAR application. This letter is a request for interpretation and response by PHMSA regarding the applicability of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) specifically pertaining to Oxus Model Number RS-00500 POC and its battery pack. Background: Oxus is a technology company that designs and manufactures oxygen concentrator products for several markets. The Oxus Portable Oxygen Concentrator gives patients independence to live their life without worrying about bottle delivery, filling bottles at home, or running out of oxygen. Device Description: The Oxus Model Number RS-00500 POC is for oxygen delivery to patients that require ambulatory supplemental oxygen therapy and utilizes molecular sieve / Pressure Swing Absorption (PSA) technology. The POC is designed to be used in many environments including but not limited to the patient's home, car, train, and aircraft. The Oxus Model Number RS-00500 POC is self-sufficient, capable of operation from AC or external DC power sources as well as a replaceable battery. This#

Page 5Oxus model is comprised of the same technology as our previously approved Model Number RS-00400 POC. Users: The device is intended to deliver concentrated oxygen, on a prescription basis, for adult patients with chronic pulmonary diseases such as chronic bronchitis, emphysema, asthma, or lung cancer, those in the terminal stage of cancer, or any patient requiring supplemental oxygen. Battery: The battery consists of (12) Lithium Ion rechargeable cells of 18650 size, assembled in a 4 series / 3 parallel (45 3P) configuration. Each cell has an average voltage of 3.6V and a typical capacity of 2.2Ah giving a battery pack of 14.4V and 6.6Ah typical. The Lithium Ion Battery specifications for this unit are attached for your review; however a brief synopsis is as follows: Chemistry Lithium Ion 14.4 VDC (nominal) Battery Options Single Battery Dimensions Double Battery (equals two single batteries) 6.59" × 4.23"x.84" (single battery) [16.7 cm x 10.7 cm × 2.1 cm] 6.59" × 4.23" × 1.68" (double battery) [16.7 cm x 10.7 cm × 4.2 cm] Weight 1.426lbs. (0.647Kg). Watt-Hour Rating per Single 97 Wh Battery Battery Duration 4 Hours (Pulse setting of 18 bpm with single battery) Charge Time 8 Hours (Pulse setting of 18 bpm with double battery) Minimum of 3 Hours for single battery and 6 hours for double battery The battery complies with the following: • Low Voltage Directive 2004/108/EC • EMC Directive 2006/95/EC • Battery Recycling Directive 2006/66/EC as amended • "RoHS" Directive 2002/95/EC Page 2#

Page 6Oxus Device Standards Compliance: The Oxus America Model Number RS-00500 POC is designed to conform to the following standards: • IEC/EN 60601-1:2012, Medical Electrical Equipment - Part 1: General requirements for basic safety and essential performance • IEC/EN 60601-1-2:2007, Part 1-2: General Requirements for Safety - Collateral Standard: Electromagnetic Compatibility - Requirements and Tests. • IEC/EN 60601-1-6:2010+A1:2013 Medical electrical equipment - Part 1-6: General requirements for basic safety and essential performance - Collateral standard: Usability • IEC/60601-1-8:2006 Medical electrical equipment - Part 1-8: General requirements for safety - Collateral standard: General requirements, tests and guidance for alarm systems in medical electrical equipment and medical electrical systems • IEC/60601-1-11:2011 Medical Electrical Equipment - Part 1-11: General requirements for safety - collateral standard: Requirements for medical electrical equipment and medical electrical systems used in the home healthcare environment. • CAN/CSA C22.2 No. 60601-1:14, Canadian Standard, Medical Electrical Equipment - Part 1: General requirements for basic safety and essential performance • Medical Device Directive 93/42/EEC Device Classification: • IEC Class II Internally Powered Equipment Class Ila according to the MDD 93/42/EEC • Type BF Applied Part • IP22 with the carry bag Drip Proof Equipment Continuous Operation Synopsis and Submission: Specifically, the following characteristics relate to the Oxus America Model Number RS-00500 POC and its battery pack: 1. The maximum operating pressure is 20.5 psig. This maximum operating pressure limit is a shutdown condition controlled by a pressure sensor within the device 2. Each single lithium ion battery pack satisfies the requirements of § 173.185(c)(1)(i) which states that the Watt-Hour rating may not exceed 100 Wh for a lithium ion battery and be marked with the Watt-hour rating on the outside case. 3. The battery has been tested in accordance with the UN Manual of tests and Criteria part III tests; and has been found to comply with the stated criteria. [USDOT-E7052] subsection 38.3 (ST/SG/AC.10/11/Rev.3) - more commonly known as the UN T1-T8 Transportation 4. The lithium ion battery pack satisfies the requirements of § 173.21 (c) which states that an electrical parks or generating a dangerous quantity of heat (for example, by the effective insulation evice is forbidden for transportation unless it is packaged in a manner to preclude it from creatir exposed terminals). The Oxus America battery pack has no exposed terminals which could be the Page 3#

Page 7Oxus against over current, over voltage, and over temperature conditions. In addition, there are also source of a short circuit. The safety profile of the battery pack includes safety circuit to protect single fault tolerances for both over current and over temperature safety protection provided by a down operation of the battery assembly. current limiting fuse and over temperature thermal fuse. All safety systems when activated shut Based upon the information provided above, we respectfully submit that the Oxus America Model Number RS-00500 POC is not currently subject to the HMR because it meets the following criteria: 1. The pressure of the oxygen in the device does not exceed 40.6 psia at 20°c; 4. The lithium ion battery used to operate the device is exempted from the HMR; . The battery pack is packaged in a manner to preclude it from creating sparks or generating a langerous quantity of heat (for example, by the effective insulation of exposed terminals); an 4. The Oxus America Model Number RS-00500 POC contains no other materials subject to the HMR. Thank you in advance for your time and consideration pertaining to this request. Please advise with any comments, questions, or concerns you may have by phone at 248-475-0925, by email at rlenarcic@oxusamerica.com, or by fax at 248-475-0938. Sincerely, Ryan Lenarcic Quality Manager OXUS AMERICA Page 4#

Page 8INSPIRED ENERGY® SOLÚTIONS FOR PORTABLE POWER Battery Specification Document Number & Revision DS274ED22 Description Rechargeable Smart Lithium Ion Battery Pack Inspired Energy Part Number For Battery NL2024ED22 Statement Of Confidentiality The information contained within this document is confidential and proprietary to Inspired Energy. This information should not, in whole or in part, be reproduced, disclosed or used except as expressly and duly authorized by Inspired Energy. This information is descriptive only. No representation, guarantee or warranty of merchantability or fitness for purpose is made or implied. Specifications are subject to change without notice. Confidential To Inspired Energy Page 1 of 23#

Page 9Specification Number DS274ED22 SOLUTIONS FOR PORTABLE POWER INSPIRED BNERGY" Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 TABLE OF CONTENTS 1. REVISION HISTORY ... 4 2. INTRODUCTION.. ....4 2.2. 2.1. SCOPE. 2.3. BATTERY PACK OVERVIEW ...4 2.3.1. GENERAL PRECAUTIONS.. ...5 ...4 2.3.2. Handling.. 2.3.3. Charge & Discharge 2.3.4. Storage... Disposal 3. REQUIREMENTS. 3.1. 3.1.1. GENERAL REQUIREMENTS 3.1.2. Nominal Voltage... 3.1.3. Rated Capacity..... 3.1.4. Discharge.. Initial Impedance. 3.1.5. 3.1.6. Charge.. 3.1.7. Terminal Specifications Storage... 3.2. FUEL-GAUGE ELECTRONICS 3.2.2. 3.2.1. DC Specifications...... Overview Of Operation. 3.2.3. 3.2.3.1. Measurement Accuracy. 3.2.3.2. Temperature.. Voltage... 3.2.4. 3.2.3.3. Current..... 3.3. SMBUS AND SBD PARAMETERS LED Indication. 3.3.2. 3.3.1. SMBus Logic Levels.... Overview Of Operations.. 3.3.4. 3.3.3. SMBus Data Protocols. 3.3.4.1. SMBus Host-to-Battery Message Protocol 3.3.4.2. Write Word. 3.3.4.3. Block Read Read Word 3.3.6. 3.3.5. SMBus Battery Critical Message Protocol.... SMBus Battery-to-Charger Message Protocol 3.3.8. 3.3.7. Host To Battery Messages (Slave Mode)..... 3.3.9. Critical Messages (Master Mode)... Battery To Charger Messages (Master Mode)... 3.4. 3.3.10. Pack Calibration Cycle. 3.4.1. PROTECTION ELECTRONICS 3.4.2. Overview Of Operation 3.4.3. Charge Protection.. Discharge Protection Confidential To Inspired Energy Page 2 of 23#

Page 10Specification Number DS274ED22 SOLETIONS FOR PORTABLE POWER INSPIRED ENERGY Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 3.5. 3.4.4. PASSIVE SAFETY PROTECTION Short-Current Protection. ...18 3.5.1. 3.5.2. Thermal Fuse. Overview Of Operation. ...19 ... 19 3.6. 3.5.3. MECHANICAL SPECIFICATIONS Slow-Blow Current Fuse (Logic Fuse) 19 19 3.6.1. 3.6.2. Weight.. ...19 3.6.3. Mating Connector.. 19 Date Code/Serial Number ...19 19 3.7. 3.6.5. Mechanical Drawing ...20 3.7.1. ENVIRONMENTAL/SAFETY SPECIFICATIONS. ...21 EMC And Safety. .23 3.8. RELIABILITY. 23 3.8.1. Life Expectancy. .23 3.8.2. 3.8.3. Warranty. 23 Shelf Life. ...23 ...23 Confidential To Inspired Energy Page 3 of 23#

Page 11Specification Number DS274ED22 SOLETIONS EOR PORTABLE POWER INSPIRED BNERGY Specification Revision 1.0 Prepared By Battery Specification RAH Issue date 2/19/09 REVISION HISTORY Revision Release Revisions / Issued Date Approved By 0.1 10/30/08 By Discussion. 0.2 RAH 11/3/08 Clarical.. DB, LJ 1.0 2/19/09 RAH DB, LJ Release. RAH DB, LJ 2. INTRODUCTION 2.1. Scope battery pack supplied by Inspired Energy. This specification is the interface document between Inspired Energy and This specification describes the physical, functional and electrical characteristics of a rechargeable Lithium Ion it's customers. It is understood that the customer may create their own internal specification. However, this specification is the master that defines the battery's operation. Battery packs produced will meet this specification. 2.2. Battery Pack Overview including a rechargeable Lithium Ion battery and a Battery Management Module. The battery consists of (12) This specification describes the physical, functional and electrical requirements for the NL2024ED Smart Battery an average voltage of 3.6V and a typical capacity of 2.2Ah giving a battery pack of 14.4V and 6.6Ah typical. Lithium Ion rechargeable cells of 18650 size, assembled in a 4 series / 3 parallel (4S 3P) configuration. Each cell has current and over-temperature, and secondary over-voltage has been implemented with a logic-fuse and controller. The battery pack comprises the individual elements as shown below. Battery Pack Cells Protection Electronics Electronics Smart Non-Electronic Protection Components Mechanical Confidential To Inspired Energy Page 4 of 23#

Page 12Specification Number DS274ED22 SOLETIONS FOR PORTABLE POWER INSPIRED ENERGY Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 2.3. General Precautions 2.3.1. Handling •• Do not immerse in water. Avoid shorting the battery Do not disassemble or deform the battery • Do not expose to, or dispose of the battery in fire. • Avoid excessive physical shock or vibration. Never use a battery that appears to have suffered abuse. Keep out of the reach of children. 2.3.2. Charge & Discharge Battery must be charged in appropriate charger only. Never use a modified or damaged charger. Specified product use only. 2.3.3. Storage Store in a cool, dry and well-ventilated area. 2.3.4. Disposal • Regulations vary for different countries. Dispose of in accordance with local regulations. REQUIREMENTS 3.1. General Requirements 3.1.1. Nominal Voltage The battery nominal operating voltage is 14.4V. 3.1.2. Rated Capacity 1320mA discharge to 11.00V @ 25C, within 1 hour of charge). The initial capacity is ≥ 6270mAh (based on a CV charge of 16.8V + 50mV with a current limit of 4A and a Confidential To Inspired Energy Page 5 of 23#

Page 13Specification Number DS274ED22 INSPIRED ENERGY SOUCTIONS FOR PORTABLE POWER Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 3.1.3. Initial Impedance The internal impedance of a fully charged battery shall be < 165m52 when measured across the positive and negative battery terminals at 1kHz at 20°C. 3.1.4. Discharge Discharge Temperature Limits: As shown below, ≤ 80%RH The battery shall be capable of continuous discharge within the Operating Boundary as shown in the graph below. battery sending TERMINATE_DISCHARGE alarm, prior to protection circuit cut-off. Host devices should be designed for a controlled shutdown following battery notification of termination by the Discharge Operating Limits 14.00 - Logic Fuse 12.00 !Discharge FET Control Limits. -40.00 •• 8.00 •-. 6.00 / / / / 4.00 / Current Delivery May be Limited by Cells <10°C i Thermal Fuse : 93°C 0.00- -10 0 10 30 40 50 60 70 80 90 100 Temp(C) Confidential To Inspired Energy Page 6 of 23#

Page 15Specification Number DS274ED22 INSPIRED ENERGY SOLUTIONS FOR PORTABLE POWER Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 3.1.5. Charge Charge Temperature Limits: As Shown below, ≤ 80%RH The battery shall be capable of continuous charge at 16.8V, as shown in the graph below. A dedicated level II or level II smart battery charger is required to charge the battery. Using this type of charger, the battery will reques appropriate charging Voltage and Current from the smart battery charger. The FULLY_CHARGED bit in the BatteryStatus will be set when the charging current tapers down under 220mA while charging at 16.8V. 5.00 Charge Operating Limits Charge FET Control Limits.! 4.00 F 77 3.00 Current(A) ! CHARGECURRENT SMBus Request? 2.00 ... 1.00 4i j -10 0 10 20 30 40 50 60 Temp(C) Confidential To Inspired Energy Page 7 of 23#

Page 16Specification Number DS274ED22 INSPIRED ENERGY' SOLETIONS FOR PORTABLE POWER Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 3.1.6. Storage Storage Temperature Limits: -20°C to 60°C, ≤ 80%RH Tempetry angs 21 C. Estered in posure on emperines bure i ef grade inter pearance anded 3.1.7. Terminal Specifications See Mechanical Drawing for orientation of contacts J1-1,5 Terminal Legend Description 1 (+) Positive side of battery 2 (C) SMBus Clock. Intermally a 1MS resistor is connected between (C) and (-). 3 (D) SMBus Data. Internally a 1M. resistor is connected between (D) and (-). 4 (T) 3000 +5% resistor connected between (T) and (-). 5 (-) Negative Side Of Battery A key slot is also present on each pack for mechanical alignment adjacent to the positive terminal. • The SMBus Clock and data lines require separate pull-ups to system logic voltage, NOT the battery voltage. Typically a 15KS pull-up resistor is used, but please refer to the SMBus Specification for additional information. 3.2. Fuel-Gauge Electronics 3.2.1. Overview Of Operation The battery is capable of communicating with host or the charger through the System Management Bus (SMBus). to process the core algorithms and perform operations required for battery monitoring. Charge and discharge current, The battery is fully SMBus and SBDS Revision 1.1 compliant. An 8-bit Reduced Instruction Set CPU (RISC) is used bit to 16-bit effective resolution. cell and pack voltages, and pack temperature are all measured using an integrated analog to digital converter at 14- to provide fuel gauging and software based charge control, and to ensure safe operation throughout the life cycle of The battery pack uses a system level approach to optimize the performance of the battery. It's primary functions are the battery. impedance tracking to accurately track the available capacity of the attached battery. To achieve the desired fuel- The fuel gauge determines the State-Of-Charge (SOC) by integrating the input and output current and using gauging accuracy, high-performance analog peripherals are used to monitor capacity change, battery impedance, environmental conditions. This approach provides the user a meaningful and repeatable capacity measure with open-circuit voltage and temperature. These factors are continually applied to account for battery non-linearity and minimal risk of overstating run time. Visually, the SOC can be obtained from the four on-pack LED's with push- Confidential To Inspired Energy Page 8 of 23#

Page 17Specification Number DS274ED22 SOLCTIONS FOR PORTABLE POWER INSPIRED ENERGY Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 Charge control is used to provide optimal and safe charging requests to an SMBus level II or level III charger. reduced power mode. Sleep mode is entered when the system senses no host or charger present. While in this mode, battery parameters continue to be monitored at regular intervals. The system will continue in this mode until it senses bring the battery voltage back up before normal operation will resume. The battery pack block diagram is shown below. PCB LOGIC FUSE N-MOSFET N-MOSF ET PACK+ PRIMARY & SECONDARY PROTECTION IC FUEL GAUGE CLOCK Temp Sense DISPLAY THERMISTOR DATA THER MOFUSEX CURREN SENSE 300 OHMS · BACK. 3.2.2. DC Specifications Active mode current consumption Parameter <650UA Limits Remarks When a host is detected (charging, discharging or Standby mode current consumption Shut-down mode current consumption <140UA ommunications) When no host activity is detectec <luA Any cell voltage falls below 2300mV. Confidential To Inspired Energy Page 9 of 23#

Page 18Specification Number DS274ED22 SOLUTIONS FOR PORTABLE POWER INSPÍRED ENERGY Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 3.2.3. Measurement Accuracy 3.2.3.1. Voltage The voltage measurements have a resolution of 1mV. The absolute accuracy of the reading is 10.7% over the esistance drops due to the shunt, safety components, and contact resistance are not taken into consideration perating range. Note that measurements are made at the cell stack (not the pack connector). Therefore interna 3.2.3.2. Temperature The internal pack temperature is measured by a NTC thermistor attached to the cell stack. Temperature readings have a resolution of 0.1°K. The absolute accuracy is +3°K over an operating range of -20°C to +80°C. 3.2.3.3.Current The current measurements have a resolution of 1mA. The absolute accuracy of the reading is #0.7% or +3mA whichever is greater over the operating range. A guard band has been imposed around zero current (-3mA to +3mA). 3.2.4. LED Indication The battery can directly display the capacity information. The battery capacity is displayed as the relative SOC. below. The LED's illuminate for 4 seconds following switch activation. If the battery voltage is to low, there will be Each LED segment represents 25 percent of the full charge capacity. The LED pattern definition is given in the table no LED indication. Capacity 1 LED Indicators # At or below 10% 2 3 4 Note Blinks 10% - 25% Lit for 4 seconds. 26% - 50% Lit for 4 seconds. 51% - 75% Lit for 4 seconds. 76% - 100% Lit for 4 seconds. 3.3. SMBus and SBD Parameters 3.3.1. Overview Of Operations and/or smart battery charger. Reference should be made to the following specifications when reading this section: The battery is fitted with a microprocessor and associated circuitry for communication with an external host device Smart Battery Data Specification (Rev 1.1, Dec 15, 1998) System Management Bus Specification (Rev 1.1, Dec 11, 1998) Smart battery Charger Specification (Rev 1.0, June 27, 1996) Confidential To Inspired Energy Page 10 of 23#

Page 19Specification Number DS274ED22 SOUCTIONS FOR PORTABLE POWER INSPIRED ENERGY Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 3.3.2. SMBus Logic Levels Symbol Parameter Limits Units Min Max Data/Clock input low voltage -0.3 0.8 Vin V Data/Clock input high voltage 2.1 5.5 Voi Data/Clock output low voltage 0.4 3.3.3. SMBus Data Protocols serial data interface. A host processor uses the interface to access various battery pack registers. SMBus Interface complies with SBS Specification Version 1.1. The battery pack includes a simple bi-directional the battery pack. The command directs the battery pack to either store the next data received to a register specified The interface uses a command-based protocol, where the host processor sends the battery address command byte to command byte or output the data specified by the command byte. 3.3.4. SMBus Host-to-Battery Message Protocol The Bus Host communicates with the battery pack using one of three protocols: • Write Word • • Read Word Read Block 3.3.4.1. Write Word example the master asserts the slave device address followed by the write bit. The device acknowledges and the The first byte of a Write Word access is the command code. The next two Bytes are the data to be written. In this master delivers the command code. The slave again acknowledges before the master sends the data word (low byte first). The slave acknowledges each byte according to the IC specification, and the entire transaction is finished with a stop condition. Command Code all Databyrelow A Databye hich A /rite Word Protoco $ I Battery Address T WrA Command Code LAL Data byte low A Data byte high Pa Vrite Word Protocol w/ PEC B HAND SMBus Host (master) Smart Battery (slave) Confidential To Inspired Energy Page 11 of 23#

Page 20Specification Number DS274ED22 SOLTIONS FOR PORTABLE POWER INSPIRED ENERGY Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 3.3.4.2.Read Word Then it must follow that command with a repeated start condition to denote a read from that device's address. The Reading data is slightly more complex than writing data. First the host must write a command to the slave device. slave then returns two bytes of data. Note that there is not a stop condition before the repeated start condition, and that a "Not Acknowledge" signifies the end of the read transfer. 13 Batery Address I Wa Command Code l Read Word Protocol Balary 8 MADEC 8 1 Read Word Protocol w/ PEC SMBus Host (master) 3.3.4.3.Block Read Smart Battery (slave) The Block Read begins with a slave address and a write condition. Then it must follow that command with a repeated start condition to denote a read from that device's address. After the repeated start the slave issues a byte count that describes how many data bytes will follow in the message. If a slave had 20 bytes to send, the first byte transfer a maximum of 32 bytes. would be the number 20 (14h), followed by the 20 bytes of data. The byte count may not be 0. A Block Read can SMBus Host (master) Smart Battery (slave) 3.3.5. SMBus Battery-to-Charger Message Protocol The Smart Battery, acting as an SMBus master will dynamically alter the charger characteristics of the Smart Charge's address, followed by a Command Code and a two byte value. The Smart Charger adjust its output to Charger, behaving as an SMBus slave using the SMBus Write Word protocol. Communication begins with the Smart Battery Broadcast Message for the Charger IS I Charge Address Battery Broadcast Message for the Charger w/ PEC Confidential To Inspired Energy Page 12 of 23#

Page 21Specification Number DS274ED22 SOLTIONS FOR PORTABLE POWER INSPÍRED ENERGY Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 Smart Battery (master) Smart Charger (slave) 3.3.6. SMBus Battery Critical Message Protocol A Smart Battery to SMBus Host or Smart Charger message is sent using the SMBus Write Word protocol. Communication begins with the SMBus Host's or Smart Battery Charger's address, tollowed by the Smart Battery's address which replaces the Command Code. The SMBus Host or that the following 16 bits are its status. Smart Charger can now determine that the Smart Battery was the originator of the message and LS I Target Address T I Battery Address Data bro bow me Battery Critical Message Data byte high EST Tare Aldes 1 Battery Critical Message w/ PEC i NATA - Smart Battery (master) Smart Host or Smart Charger (slave) 3.3.7. Host To Battery Messages (Slave Mode) The Host acting in the role of bus master uses the read word, write word, and read block protocols to communicate with the battery, operating in slave mode. Confidential To Inspired Energy Page 13 of 23#

Page 22Specification Number DS274ED22 SOLETIONS FOR PORTABLE POWER INSPIRED ENERGY Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 Host-to-Battery Messages Function Command ManufacturerAccess) Code Description Unit Access Default Remaining CapacityAlarm) 0x00 (POR) BatteryMode() Remaining TimeAlarm() 0x01 0x02 Remaining Capacity Alarm Threshol AtRate() 0x03 Remaining Time Alarm Threshok minutes mAN r/W 660 Bit flags r/W 10 0x04 This function is the first half of a two-function call-set used to mA r/W 0x0080 set the AtRate value used in calculations made by the AtRate TimeToFull), AtRateTimeToEmpty0, and AtRateOK( AtRate Time ToFull 0x05 function she predicted remaining time to fully charge the minutes 65535 AtRate Time ToEmpty0 0006 Returns the predicted remaining operating time if the battery minutes 65535 AtRateOKO 0x07 boolean Temperature() 0x08 AtRateOK function will ALWAYS retum TRUE. Current() Voltage() 0x09 0.1°K Oxoa mv AverageCurrenti oattery's terminals mA Returns a rolling average based upon the last 64 samples of mA MaxError RelativeStateOfCharge() Oxoc Oxod as a percentage of FullChargeCapacity. Returns the predicted remaining battery capacity expressed Returns the expected margin of error. percent percent AbsoluteStateOfCharge() Oxle Returns the predicted remaining battery capacity expressed as a percentage of DesignCapacity). percent FullChargeCapacityl Remaining Capacity Oxof RunTimeToEmpty0 0x11 0x10 Returs the predicted remaining battery capacity. Returns the predicted remaining battery life at the present Returns the predicted battery capacity when fully charged. mAh mAn Returns the rolling average of the predicted remaining battery rate of discharge minutes 65535 Average Time ToEmpty) 0x12 minutes 65535 Average TimeToFullO 0x13 Returns the rolling average of the predicted remaining time until the battery reaches full charge. minutes 65535 ChargingCurrent BatteryStatus( ChargingVoltage) 0x14 0x15 Retums the battery's desired charging voltage. Returns the battery's desired charging rate. mA Bit flags mV 4000 CycleCount) 0x16 cycles ---- 16800 0x17 Returns the number of charge/discharge cycles the battery as experienced. A charge/discharge cycle is defined as: ar seco amount of discharge approximately equal to the value o DesignCapacity® Design Voltage 0x19 0x18 Returns the theoretical capacity of the new battery. DesignCapacity. mV mAh Returns the version number of re 80 are altery pack 6600 Specificationinfo() Ox1a Formatted 220050 ManufacturerDate() оX1b supports, as well as voltage and current scaling information. Formatted word SerialNumber() Reserved Oxic Returns the electronics serial number. number word Ox1d ManufacturerNamed Returns a character array containing the manufacture's string insPIREDE eviceName eviceChemistry 0x22 0x21 string string NL2024E Returns data specific to the manufacture hemistry. LION ManufacturerDatal 0x23 Confidential To Inspired Energy Page 14 of 23#

Page 23Specification Number DS274ED22 SOLUTIONS FOR PORTABLE POWER INSPIRED ENERGY Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 3.3.8. Battery To Charger Messages (Master Mode) operating in slave mode. If the CHARGER_MODE bit in BatteryMode is clear, the Battery will broadcast Charger The battery, acting in the role of a bus master, uses the write word protocol to communicate with the charger, request information every 10 to 60 second. Battery-to-Charger Messages Function Charging Voltage) ChargingCurrentl Command Code 0x15 0x14 Description Sends the desired charging voltage to the battery charge Sends the desired charging rate to the battery charge Unit mV mA Access: W W 3.3.9. Critical Messages (Master Mode) Whenever the Battery detects a critical condition, it takes the role of a bus master and sends Alarm Warning0 until the critical condition(s) has been corrected. message to the Host and/ or Charger. The Battery broadcasts the Alarm Warning() message at 10 second intervals Battery Critical Messages Function AlarmWarning0 Command Code 0x16 Description or more alarm conditions exist. This message is to the host and/or charger to notify them that one Unit Formatted Access word W Confidential To Inspired Energy Page 15 of 23#

Page 24Specification Number DS274ED22 SOLTIONS FOR PORTABLE POWER INSPIRED ENERGY* Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 Alarm Bit Definitions Bit Battery Status 15 OVER_CHARGD_ALARM Remaining Capacity exceeds Set When: Stop charging. Action When Set: A continuous discharge of »= Cleared When TERMINATE_CHARGE ALARM Stop charging. threshold. COV recovery <= 4150mV OTC recovery <= 56°C OCC recovery <= 200mA for 70sec Reserved OVER_TEMP_ALARM Over-Temp Charge (OTC) or Over- OTC=58°C Temp discharge (OTD) condition. be disabled to Appropriate FET will OTC recovery = 56°C OTC or OTD recovery threshold prevent further 11 ¡TERMINATE_DISCHARGE_ALARM OTD recovery = 65°C Relative StateOfCharge <= 0%, Stop discharging. CUV, PUV, OCD or OTD recovery RelativeStateOrCharged >= 1%, threshold. PUV=10000mV CUV =2500mV JV reçovery >= 12000n UV recovery >= 3000m OCD recovery >= -200mA for 70sec OCD = -10000mA OTD recovery <= 65°( OTD = 75°C REMAINING_CAPACITY_ALARM Remaining Capacity, < Remaining CapacityAlarmO User defined. 8 LEASE HE MARAN Remaining CapacityAlarm) = 0 or is AverageTimeToEmpty) < Remaining TimeAlarmO User defined. Remaining TimeAlarm) = 0 or <= «RemainingCapcity). Average Time ToEmpty). Status Bit Definitions Bit Battery Status DISCHARGING INITIALIZED Set When: Action When Set: Batter is not in charge mode. None. None. Cleared When: 5 FULLY CHARGED Battery is in charging mode. charge termination. When the battery detects a primary Stop charging. 4 FULLY DISCHARED Relative StateOfCharge() <= 95%. RelativeStateOfCharge <= 0%. Stop discharging. RelativeStateOfCharge() >= 20%. 3.3.10. Pack Calibration Cycle The NL2024ED uses the Impedance Track Technology to measure and calculate the available charge in battery cells. The achievable accuracy is better than 1% error over the lifetime of the battery. Max Error increases by 1% in 20 cycles, e.g., only occasionally is a full charge/discharge learning cycle required to maintain high accuracy. Confidential To Inspired Energy Page 16 of 23#

Page 25Specification Number DS274ED22 SOLETIONS FOR PORTABLE POWER INSPIRED ENERGY" Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 3.4. Protection Electronics 3.4.1. Overview Of Operation Electronic circuitry is permanently connected within the battery pack to prevent damage if either the charger or host the battery terminals, or an illegal load is connected. Redundant levels of protection have been implemented (the device tails to function correctly. The circuitry also protects the battery if an illegal current source is placed across primary protection levels are auto-resettable and the secondary are non-resettable ). 3.4.2. Charge Protection Over-Voltage: cell voltages are <= 4150mV, it will allow charging again. The primary protection circuit will prevent the battery from charging if any cell voltage >= 4300mV. Then, once all The secondary protection circuit will prevent the battery from charging if any cell voltage >= 4.45V +/-0.05V by blowing a power path logic fuse. The fuse is non-re-settable rendering the battery pack non-functional. Over-temp: The primary protection circuit also provides over-temperature protection and will prevent the battery from charging at temperatures =>54°C(see paragraph 3.1.5 for ChargeCurrent) request). Then, once the battery temperature has cooled to <=45°C, it will again allow charging. Over-Current: charging at Current) =>4.25A. Then, once the AverageCurrent() <= 200mA for 70sec, the battery will re-test the The primary protection circuit also provides continuous over-current protection and will prevent the battery from over-current condition, and again allow charging. 3.4.3. Discharge Protection Under-Voltage: The primary protection circuit will prevent the battery from being further discharged once any cell voltage reaches <=2500mV. Then, once all cell voltages are >= 3000mV, it will allow discharge again. Over-temp: The primary protection circuit also provides over-temperature protection and will prevent the battery from discharging. discharging at temperatures => 75°C. Then, once the battery temperature has cooled to <=65°C, it will again allow If the battery reaches 85°C for any reason the secondary protection circuit will blow the in-line power path logic fuse. The fuse is non-re-settable rendering the battery pack non-functional. Confidential To Inspired Energy Page 17 of 23#

Page 26Specification Number DS274ED22 INSPIRED ENERGY SOLUTIONS FOR PORTABLE POWER Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 Over-Current: The primary protection circuit also provides continuous over-current protection and will prevent the battery from discharging at Current <= -10.00A. Then, Once the AverageCurrent) >= -200mA for 70sec, the battery will re-test the over-current condition, and again allow discharging. 3.4.4. Short-Current Protection The primary protection circuit will prohibit the discharge of the battery if a short-circuit is placed across the battery condition, and again allow discharging. + / - terminals. Then, once the AverageCurrent) >= -1mA for 70sec, the battery will re-test the short-circuit The pack is design to withstand reasonable in-rush currents without resetting the electronics and without interrupting he discharge cycle. The following graph illustrates the short-circuit/in-rush set points as implemented Inrush Current Protection Short-Circuit Discharge 40A- Over-Current Discharge 20A- OA 31ms → Confidential To Inspired Energy Page 18 of 23#

Page 27Specification Number DS274ED22 SOLUTIONS EOR PORTABLE POWER INSPIRED ENERGY Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 3.5. Passive Safety Protection 3.5.1. Overview Of Operation The battery pack is fitted with additional components to protect it against abusive charge and discharge conditions. These are in addition to the electronic protection. 3.5.2. Thermal Fuse device goes open circuit if the cell case temperature reaches the fuse's temperature rating of 93°C (+0°C, -5°C). The 1 Thermal Fuse is fitted in series with the charge/ discharge path to protect the battery from over temperature. This fuse is non-re-settable rendering the battery pack non-functional. 3.5.3. Slow-Blow Current Fuse (Logic Fuse) current over-load. The hold current is rated at 15A for 4 hours (minimum@25C). The fuse is non-re-settable A current slow-blow fuse is assembled in series with the battery pack to protect the battery pack against abusive over rendering the battery pack non-functional. 3.6. Mechanical Specifications 3.6.1. Weight Approximately 1.426lbs. (0.647Kg). 3.6.2. Mating Connector The recommended interconnection mating male connector is AMP P/N 5787422-1 or 5787446-1. 3.6.3. Date Code/Serial Number LE YYWWRR TE = Inspired Energy Newberry facility SN SSSSS XZZWh WW = Calendar Week YY = Calendar Year SSSSSS = Serial Number RR = Battery revision ZZWh = the stored energy of the battery in Watt hours X = the cell supplier Confidential To Inspired Energy Page 19 of 23#

Page 28Specification Number DS274ED22 SOLCTIONS FOR PORTABLE POWER INSPIRED ENERGY Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 3.6.4. Packaging The batteries are packaged in bulk, with 12 batteries per carton. Confidential To Inspired Energy Page 20 of 23#

Page 29Confidential To Inspired Energy 3.6.5. Mechanical Drawing Battery Specification Issue date Prepared By larsings ABCDE F Specification Revision Specification Number Positive Terror pre Page 21 of 23 2/19/09 RAH 1.0 DS274ED22#

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Page 31Specification Number DS274ED22 SOLCTIONS FOR PORTABLE POWER INSPIRED ENERGY" Specification Revision 1.0 Prepared By RAH Battery Specification Issue date 2/19/09 3.7. Environmental/Safety Specifications 3.7.1. EMC And Safety • EMC Directive 2006/95/EC The battery complies with the following: • Low Voltage Directive 2004/108/EC "RoHS" Directive 2002/95/EC Battery Recycling Directive 2006/66/EC as amended (ST/SG/AC.10/11/Rev.3) - more commonly known as the UN T1-T8 Transportation tests; and has been found to The battery has been tested in accordance with the UN Manual of tests and Criteria part III subsection 38.3 comply with the stated criteria. [USDOT-E7052] The battery has the following approvals and the pack will be labeled according: • FCC Part 15 Class B CE [ENS5022:2006 (ITE Class B) & EN55024:1998 (ITE)] 3.8. Reliability 3.8.1. Life Expectancy charge/discharge cycles where the charge phase is CC/CV 4000mA, 16.8‡0.05V and the discharge is 4000mA down Given normal storage & usage, user can expect the battery to deliver 80% or more of it's initial capacity after 300 to 2.9V/Cell at 25°C. 3.8.2. Warranty material and construction. The warranty period is one (1) year from the date of shipment from Inspired Energy. Inspired Energy maintains a high quality standard. All products are warranted against defects in workmanship, 3.8.3. Shelf Life The batteries are shipped from Inspired Energy with between 30% and 50% rated capacity and this provides a period then the shelf life will be reduced and provisions should be made to recharge the battery periodically. minimum of 6 months shelf life, when stored at 25°C. If the storage temperature exceeds 25°C over the 6-month Confidential To Inspired Energy Page 23 of 23#