# Steinbrecher & Span LLP — Hazardous Materials Safety Interpretation

**Citation:** 18-0072  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2018-09-20

18-0072 response to Steinbrecher & Span LLP concerning 175.10.

## Document text

<<<PAGE 1>>>

U.S. Department
of Transportation
Pipeline and Hazardous
Materials Safety
Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
SEP 2 0 2018
Sophy Chen
Counsel
Steinbrecher & Span LLP
1155 F Street, NW
Suite 1050
Washington, DC 20004
Reference No. 18-0072
Dear Ms. Chen:
This letter is in response to your May 11, 2018, letter requesting clarification of the Hazardous
Materials Regulations (HMR; 49 CFR Parts 171-180) applicable to the carriage of lithium ion
batteries on passenger aircraft. Specifically, you ask if an airline passenger carrying a lithium
battery powered device and spare batteries for that device for professional purposes may use the
§ 175.1 0(a)(l 8) exception, provided that quantity limits are met. Furthermore, you request that
your understanding of the following scenario is correct:
• A professional camera operator is traveling to a job site and carrying spare lithium ion
batteries for use in equipment for work. The lithium ion batteries will not be resold or
distributed.
• An unlimited number oflithium ion batteries that do not exceed 100 Watt-hour (Wh) may
be carried in carry-on baggage.
• With the approval of the airline, two lithium ion batteries that exceed 100 Wh, but do not
exceed 160 Wh, may be carried in carry-on baggage.
Your understanding is correct. Section 175.10(a)(18) of the HMR details exceptions for portable
electronic devices, including those powered by lithium batteries and spare batteries for these
devices when carried by passengers or crewmembers for personal use. In the scenario described
in your request, the professional camera operator is eligible to carry lithium batteries in
accordance with§ 175.10(a)(l8). Furthermore,§ 175.10(a)(l8)(ii), details the quantity and size
limits of lithium ion batteries carried on passenger aircraft, which indicates that:
• The lithium ion batteries must not exceed 100 Wh;
• With the approval of the airline, portable electronic devices may contain lithium ion
batteries exceeding 100 Wh, but not exceeding 160 Wh; and
• With the approval of the airline, no more than two individually protected lithium ion
batteries each exceeding 100 Wh, but not exceeding 160 Wh, may be carried per person
as spare batteries in carry-on baggage.

<<<PAGE 2>>>

Please note that the lithium ion batteries must also be a type proven to meet the requirements of
each test in the UN Manual of Tests and Criteria, Part III, Sub-section 38.3 and each spare
lithium ion battery must be individually protected so as to prevent short circuits ( e.g., by
placement in original retail packaging, by otherwise insulating terminals by taping over exposed
terminals, or placing each battery in a separate plastic bag or protective pouch).
I hope this information is helpful. Please contact us if we can be of further assistance.
Sincerely, ~
rkDer~~ ·
Chief, Standards Development
Standards and Rulemaking Division

<<<PAGE 3>>>

0elllr .
~ttent~
1'2>-0~
January, Ikeya CTR (PHMSA)
From:
Sent:
To:
Subject:
INFOCNTR (PHMSA)
Monday, May 14, 2018 5:12 PM
Hazmat Interps
FW: Request for Interpretation
Attachments: 2018-05-ll
_PHMSAinterpRequest_l 75-10-a-18-ii_Signed.pdf; AttA_FAA-Pack-
Safe_Retrieved-2018-05-11.pdf; AttB_F AA-Airline-Passengers-And-
Batteries_Retrieved-2018-05-11.pdf
Hi lkeya,
Thanks,
Jodi
Attached is a request for a letter of interpretation. Please let me know if you have any questions.
From: Sophy Chen [mailto:schen@steinbrecherspan.com]
Sent: Friday, May 11, 2018 4:59 PM
To: INFOCNTR (PHMSA) <INFOCNTR.INFOCNTR@dot.gov>
Subject: Request for Interpretation
We respectfully submit this request for a formal interpretation, as described in the attached letter. We
look forward to a prompt response. Thank you in advance for your help.
- With best regards, Sophy
Sophy Chen I mobile: 202-329-4207
Steinbrecher & Span LLP I Washington, DC
1

<<<PAGE 4>>>

STEINBRECHER & SPAN LLP
LOS ANGELES I WASHINGTON I HOU STON
1155 F ST. N .W.
SUITE 1050
WASHINGTON. DC 20004
TEL: 202-559-8680
FA X: 213-891-1470
EMAi L: sch en @steinbrec hers pan .co m
May 11 , 2018
Mr. Shane Kelley
Director, Standards and Rulemaking Division
U.S. DOT/PHMSA (PHH-10)
1200 New Jersey Avenue, SE East Building, 2nd Floor
Washington, DC 20590
Re: Request for Interpretation of 49 C.F.R. § l 75.10(a)(18)(ii)
Dear Mr. Kelley:
We are seeking confirmation that the exceptions in 49 C.F.R. § 175.lO(a)(lS) are available when an airline
passenger is on business travel.
Section 175. lO(a)(lS) permits an air carrier passenger to travel with spare lithium batteries for personal
use. Spare batteries must be carried in carry-on baggage only. Subsection 175. lO(a)(l S)(ii) permits a
passenger to carry an unlimited number of batteries that do not exceed 100 Wh. And, for batteries
exceeding 100 Wh but not exceeding 160 Wh, a passenger may carry (with airline approval) no more than
two individually protected batteries per person as spares.
The Federal Aviation Administration has provided information about what "personal use" means under the
regulation. FAA published guidance states, "With airline approval, passengers may also carry up to two
spare larger lithium ion batteries (101-160 watt hours). This size covers the larger after-market extended-
life laptop computer batteries and some larger batteries used in professional audio/visual equipment." This
guidance explicitly acknowledges that the personal-use requirement in§ 175.l0(a)(lS) includes
professional use. The guidance clarifies that "[spare (uninstalled) lithium ion] batteries carried for further
sale or distribution (vendor samples, etc.) are prohibited." See "Pack Safe," available at
https://www.faa.gov/about/initiatives/hazmat_safety/ and reproduced at Attachment A.
Similarly, other FAA guidance states in response to "Is there a limit to the number of batteries or devices I
can carry?" that "The main limit is that the batteries and devices must be for personal use (includes
professional use). Batteries and battery-powered devices carried for resale or for distribution by a vendor
do not qualify for these exceptions." See "Batteries Carried by Airline Passengers," available at
https:/ /www .faa.gov/about/office _ org/headquarters _ offices/ash/ash _programs/hazmat/passenger _info/medi
a/Airline_passengers_and_batteries.pdf and reproduced at Attachment B.

<<<PAGE 5>>>

Mr. Shane Kelley
May 11, 2018
Page 2
Our understanding is that§ l 75.10(a)(18)(ii) permits a professional camera operator who is an airline
passenger traveling to a job site to carry in carry-on baggage as spares (A) an unlimited number of lithium
ion batteries that do not exceed 100 Wh and (B) with the airline's approval, two lithium ion batteries that
each exceed 100 Wh (but do not exceed 160 Wh).1 The camera operator would use the spare batteries-
personally-in equipment used for his work. They would not be resold or distributed.
Please confirm our understanding that being on business travel does not render the passenger exception in
49 C.F.R. § 175.10(a)(18)(ii) unavailable. If that is not the case, we would appreciate guidance on what
rules and exceptions apply to the passenger and circumstances we have described.
Sincerely,
Soph!J Chert
Sophy Chen
Counsel
1 In addition, the camera operator/passenger would adhere to the exception's other requirements. That is, the passenger
would carry only batteries of a type proven to meet the requirements of each test in the UN Manual of Tests and Criteria,
Part III, Sub-section 38.3. 49 C.F.R. § 175.10(a)(18). And to prevent short circuits, each spare battery would be
individually protected. Id.

<<<PAGE 6>>>

Attachment A
5/ 11 /2018
•
Pack Safe
Federal Aviation
Administration
Pack Safe
SPENDING 5 MINUTES CHECKING YOUR LUGGAGE
FOR HAZARDOUS MATERIALS GETS US ALL THERE SAFER.
Some of the common toiletry and electronics items you may have packed in your baggage are considered hazardous
material. E-cigarettes (vaping devices), spare batteries for your electronics, nail polish, hair spray and other common
items can be hazardous If not properly packed. The FAA recommends that passengers carry their portable electronic
devices in their carry-on bags whenever possible instead of in checked baggage. The FAA requires that you carry e-
cigarettes and spare lithium batteries in your carry-on baggage. They are always forbidden in checked baggage -
including in bags checked at the gate or planeside.
For questions about how to safely pack other items in your checked baggage, please refer to the chart below. There
are serious consequences for passengers who violate the hazardous materials rules.
For a Safe Start, Check the Chart!
Most hazardous materials are forbidden in carry-on and checked baggage. There are a few exceptions for some
personal items such as toiletries, medicines, battery powered electronics and assistive devices. The chart below lists
common hazardous materials often found in the home and office or used when traveling (the chart also includes
some items that are not hazardous materials but the FAA gets lot of questions on them). Check to see which ones
are allowed in checked and/or carry-on baggage and which ones cannot be carried at all. The checked baggage rules
also apply to carry-on bags that are checked at the gate or at planeside. When using the chart, it's very important to
read the "Details" section for important information such as packaging requirements and quantity limits. You can use
the "Search" box to look up a particular item by name within the active tab.
Remember, this is just a listing of common hazardous materials; if you don't see your item here it doesn't mean it's
allowed in baggage. When in doubt, leave it out!
Product Safety Recalls: If a product that is a hazardous material or that contains a hazardous material component
(e.g., battery) is subject to a safety recall related to the hazardous material, it must not be carried aboard an aircraft
or in baggage unless the recalled product/component has been replaced or repaired or otherwise made safe per
manufacturer/vendor instructions. The FAA and your airline may offer further public guidance on individual recalled
products.
https://www.faagov/about/initiatives/hazmat
_safety/ 1/4

<<<PAGE 7>>>

5/11/201 8 Pack Safe
Looking for other FAA hazmat information? The FAA Office of Hazardous Materials SafetY. Attachment A
.(www.faa.gov/about/office org/headguarters offices/ash/ash 12rograms/hazmaU)_
web site contains information for
airlines, cargo shippers, and passengers.
Note: The Trans12ortation SecuritY. Administration (htt12://www.tsa.gov{}_also has rules on "prohibited items" that pose
a security threat. Though they sometimes overlap, the TSA security rules are separate from the FAA hazmat safety
rules discussed here. For the TSA rules on weapons, sharp objects, the "3-1-1" rule on liquids, gels, and aerosols,
etc.; go to the TSA Prohibited Items (http://www.tsa.gov/traveler-information/prohibited-items)_web page.
Security Screening Questions? For questions on the rules for liquids in carry-on, sharp objects, weapons, tools,
medicines and medical devices, food, "prohibited items," and general security screening questions, see the TSA's
securitY. rules and guidance (htt12s://www.tsa.gov/travel)_. You may also contact the TSA
.(htt12s://www.tsa.gov/contact/customer-service)_via phone, e-mail or Tweet.
Hazmat Questions? For questions about hazardous materials (chemicals, batteries, battery-powered devices,
gases, aerosols, flammables, etc.) you may contact the FAA Office of Hazardous Materials Safety via e-mail at
hazmatinfo@faa.gov. Please allow 1-2 business days for answers to e-mail questions.
All Medicinal
& Toiletry
Matches ·
& Lighters
Batteries Assistive Devices Outdoors Misc
& Electronics
Show ( _ 10 ~ l entries
~ Hazardous Material --~-
I
Search: ,Batteries
J Checked Bag Carry On i
I F,-1----------· ··
- ·--:
' ~~ ---~~--"' '•=-.---
✓ , ✓ Details
i · (more info/?
I hazmat=33)
I
Batteries, wet, nonsgillable
.(more info/?hazmat=33).
Small gel cell and absorbed electrolyte batteries for portable
electronics
X
✓
Details
(more_info/?
hazmat=61)
Electronic cigarettes, va12ing devices
.(more info/?hazmat=61).
Battery-powered E-cigarettes, vaporizers, vape pens, atomizers,
electronic nicotine delivery systems
https://www.faa.gov/about/initiatives/hazmat_safety/
2/4

<<<PAGE 8>>>

:/1 1/2018
! Hazardous Material
Pack Safe
Checked Bag
X
Carry On
✓
Details
(more_info/?
hazmat=35)
Fuel cells containing flammable gases or water-reactive
material
. (more info/?hazmat=35).
✓
✓
Details
( more _info/?
hazmat=34)
Fuel cells containing flammable liguid or corrosive
material
.(more info/?hazmat=34).
·
- ---------------- ----------
------------
··--
-
✓ . ✓
Details
( more _info/?
hazmat=15)
Heat groducing articles
/ . (more info/?hazmat=15).
Diving lamps, soldering equipment
i·;· ,,
,,,
.,.,~
X
¢
Lithium ion and lithium metal batteries,....§J:!are (uninstalled) .
. (more info/?hazmat=7).
Rechargeable and non-rechargeable lithium batteries, cell phone
batteries, laptop batteries
Details
(more_info/?
hazmat=7)
✓
I
' •
See Details
!
I
i
!
✓
Details
(more_info/?
hazmat=23)
Portable electronic devices, containing batteries
.(more info/?hazmat=23).
Cell phones, laptop, camera, smart phones, PDAs
~-- ---------------------'---------'------'--------.J
https://www.faa.gov/about/initiatives/hazmat_safety/ 3/4

<<<PAGE 9>>>

5/11/2018 Pack Safe
~-----------------------,---------,-------,--------A----..:ebnnm A
Hazardous Material
Checked Bag
Carry On
' •
See Details
I
•
Restrictions
Apply
Details
(more_info/?
hazmat=66)
Portable recreational vehicles powered by lithium ion
batteries .
. (more info/?hazmat=66).
t- H
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. (more info/?hazmat=32).
Alkaline, nickel metal hydride, nickel cadmium
X
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Details
(more_info/?
hazmat=36)
.Spare fuel cells and cartridg~
. (more info/?hazmat=36).
Showing 1 to 10 of 14 entries (filtered from 66 total entries)
Previous 1 2 Next
Hazardous Materials Safety Contacts ( contact!)
Page last modified: July 25, 2017 9:41 :27 AM EDT
This page was originally published at: https://www.faa.gov1about/initiatives/hazmat_safetyl
https://www.faa.gov/about/initiatives/hazmat_safety/
4/4

<<<PAGE 10>>>

hi• Lithium ion and lithium metal batteries, spare (uninstal .. £.1
·•s:tf Rechargeable and non-rechargeable lithium batteries, cell phone batteries, laptop
batteries, external batteries, portable rechargers
~
Size limits: Lithium metal (non-rechargeable) batteries are limited to 2
grams of lithium per battery. Lithium ion (rechargeable) batteries are
· limited to a rating of 100 watt hours (Wh) per battery. These limits allow
for nearly all types of lithium batteries used by the average person in their
electronic devices. With airline approval, passengers may also carry up to
two spare larger lithium ion batteries (101-160 watt hours). This size
covers the larger after-market extended-life laptop computer batteries and
some larger batteries used in professional audio/visual equipment.
Quantity limits: None for most batteries -
. but batteries must be for use
by the passenger. Batteries carried for further sale or distribution (vendor
samples, etc.) are prohibited. There is a limit of two spare batteries per
person for the larger lithium ion batteries described above (101-160 watt
hours per battery).
Batteries must be protected from damage.
Battery terminals (usually the ends) must be protected from short circuit
(i.e., the terminals must not come in contact with other metal). Methods
include: leaving the batteries in their retail packaging, covering battery
terminals with tape, using a battery case, using a battery sleeve in a
camera bag, or putting them snugly in a plastic bag or protective pouch.

<<<PAGE 11>>>

Attachment B
Batteries Carried by Airline Passengers
Frequently Asked Questions
Q1. What kinds of batteries does the FAA allow in carry-on baggage (in the aircraft cabin)?
A 1. For carry-on baggage checked at the gate or planeside, see Q2, below. Passengers can carry most consumer-type batteries
and portable battery-powered electronic devices for their own personal use in carry-on baggage. Spare batteries must be protected
from damage and short circuit. Battery-powered devices must be protected from accidental activation and heat generation.
Damaged or recalled batteries, including when in a device, must not be carried. Batteries allowed in carry-on baggage include:
• Dry cell alkaline batteries: typical AA, AAA, C, D, 9-volt, button-sized cells, etc.
• Dry cell rechargeable batteries such as Nickel Metal Hydride (NiMH) and Nickel Cadmium (NiCad). For rechargeable lithium
ion batteries; see next paragraph.
• Lithium ion batteries (a.k.a.: rechargeable lithium, lithium polymer, LIPO, secondary lithium). Passengers may carry all
consumer-sized lithium ion batteries (up to 100 watt hours per battery). This size covers AA, AAA, cell phone, PDA, camera,
camcorder, handheld game, tablet, portable drill, and standard laptop computer batteries. The watt hours (Wh) rating is marked
on newer lithium ion batteries and is explained in #3 below. External chargers are also considered to be a battery.
With airline approval, devices can contain larger lithium ion batteries (101-160 watt hours per battery), but spares of this size are
limited to two batteries in carry-on baggage only. This size covers the largest aftermarket extended-life laptop batteries and
most lithium ion batteries for professional-grade audio/visual equipment.
• Lithium metal batteries (a.k.a.: non-rechargeable lithium, primary lithium). These batteries are often used with cameras and
other small personal electronics. Consumer-sized batteries (up to 2 grams oflithium per battery) may be carried. This includes
all the typical non-rechargeable lithium batteries used in cameras (AA, AAA, 123, CR123A, CRl, CR2, CRV3, CR22, 2CR5,
etc.) as well as the flat round lithium button cells.
• Nonspillable wet batteries (absorbed electrolyte), limited to 12 volts and 100 watt hours per battery. These batteries must be
the absorbed electrolyte type (gel cells, AGM, etc.) that meet the requirements of 49 CFR 173 .159a( d); i.e., no electrolyte will
flow from a cracked battery case. Batteries must be in strong outer packagings or installed in equipment. Passengers are also
limited to two (2) spare (uninstalled) batteries. Spare batteries' terminals must be protected (non-conductive caps, tape, etc.)
within the outer packaging. Batteries and outer packaging must be marked "nonspillable" or "nonspillable battery." Note: This
exception is for portable electronic devices, not for vehicle batteries. There are separate exceptions for powered wheelchairs.
Q2. What kinds of batteries does the FAA allow In checked baggage (including gate-checked bags)?
A2. Except for spare (uninstalled) lithium metal and lithium-ion batteries, all the batteries allowed in carry-on baggage are also
allowed in checked baggage. The batteries must be protected from damage and short circuit or installed in a device. Battery-powered
devices--particularly those with moving parts or those that could heat u~ust be protected from accidental activation. Spare
lithium metal and lithium ion/polymer batteries are prohibited in checked baggage-this includes external battery packs. Electronic
cigarettes and vaporizers are also prohibited in checked baggage. "Checked baggage" includes bags checked at the gate or planeside.
Q3. A3. How do I determine the watt hours (Wh) rating of a battery?
To determine watt hours (Wh), multiply the volts (V) by the ampere hours (Ah). Example: A 12-volt battery rated to 8 Amp
hours is rated at 96 watt hours (12 x 8 = 96). For milliamp hours (mAh), divide by 1000 (to get to Ah) and then multiply by the volts.
Q4. A4. Is there a limit to the number of batteries or devices I can carry?
The main limit is that the batteries and devices must be for personal use (includes professional use). Batteries and
battery-powered devices carried for resale or for distribution by a vendor do not qualify for these exceptions. There is a two-spare
limit on the large lithium-ion (101-160 Wh) and nonspillable batteries (see the chart on the next page).
Q5. What does "protected from short circuit" mean?
AS. When metal objects such as keys, coins, tools or other batteries come in contact with both terminals of a battery it can create a
· "circuit" or path for electricity to flow through. Electrical current flowing through this unprotected short circuit can cause extreme
heat and sparks and even start a fire. To prevent short circuits, keep spare batteries in their original packaging, a battery case, or a
separate pouch or pocket. Make sure loose batteries can't move around. Placing tape over the terminals of unpackaged batteries
also helps to insulate them from short circuit.
For a quick reference guide, see illustrated table on next page .. .
Sep 9, 2016
Federal Aviation Administration
Office of Hazardous Materials Safety http://www.faa.gov/Go/PackSafe

<<<PAGE 12>>>

Attachment B
Batteries Allowed in Airline Passenger Baggage in the US Sep 9, 2016
Based on US DOT regulations (49 CFR, Sec. 175.10). TSA security, individual airline, and international rules may, at times, be more restrictive.
·!;~~i~: ,,p(~, ,~~.f)'_Th~r,- ~ Ji!,r.ti'.' li~lt:'. :~o~e~~ carry-on
Jo, .!he numoer-0fbatter devices Gamed for .
'1-------~----'= =----1--_.._..__,,,_________~-----'--=~
}"ir$b~~1.:J:~1i'fil¢$$!s' .. QE3f9W, >< .', t c' '., In e ui_ tnent2 S S
Dry alkaline batteries
.11.1··, ..
· _• j c
I ,
"'
- ~
, ; · ~ : ~ ··
. ' .
- ~ ~ :~. ::
Dry rechargeable - Nickel Metal Hydride
(NiMH), Nickel Cadmium (NiCad}, etc.
·
-
-·
~ --,--
' ..-~ "
, , For lithium
, ion. see
· " below.
Lithium ion (rechargeable lithium, lithium
polymer, LIPO) as used in small consumer
electronics, such as cell phones, tablets, tools,
cameras, PDAs,.and laptops. Limited to 100 watt
hours3 or less per battery.
YES ·
YES
YES
YES
When protected from
damage and short
circuit
When protected from
damage and short
circuit
YES
YES
·YES
YES
When protected from
damage and short
circuit
VI/hen protected from
damage and short
circuit
YES
YES
YES
NO
When protected from
damage and short
circuit
E--cigareltes and
vaporizers are
prohibited in
checked baggage.
Larger lithium ion, 101-160 watt
hours3 per battery-with airline approval.
YES
Limits: Two spare batteries per
passenger-with airline approval.
-Airline approval
required ·
Lithium metal (non-rechargeable} as used in
YES
small consumer electronics such as cameras,
LED flashlights, watches, etc. (2 grams or less ,;ii.I
Nonspillable wet batteries (absorbed
electrolyte) for portable electronic devices, 12
volts and 100 watt hours3 per battery.
Limits: Two spare batteries
per passenger.
YES
YES
When protected from
damage and short
circuit, and ...
Airline approval
required
YES
When protected from
damage and short
circuit
YES
YES
Airfiile approval
reqt;ired '
·YES ,
£--cigarettes and
vaporizers are
prohibited in
checked baggage.
YES
NO
NO
YES
When protected from When protected from
damage and short damage and short
circuit and in strong circuit and in strong
packaging. Battery packaging. Battery
and outer packaging and outer packaging
must be marked must be marked
"nons ·11able. • "nons illable.'
2Note: TSA security rules prohibit some power tools in cany-on baggage.
1 Nole: "Checked baggage" includes canyon-bags checked al the gate or planeside.
3Nole: Watt hours (Wh) = Volts (V) x Amp hour (Ah) or for milliamp hours Wh = V x (mAh + 1000)

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/interpretations/69231/180072.pdf>
- Source ID: `phmsa`
- SHA-256: `b558e3d6538adb2f60b92c25592ba15043655a8c3bff9f64e5a39c5835570ba6`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-25T14:26:17.312Z
- Document slug: `phmsa-interpretation-18-0072`

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