background image with blue sky and clouds
Exit Government Site Below
icon of a battery

US Department of Transportation, Pipeline and Hazardous Materials Safety Administration
blue lines
Whats New Larger Batteries
Basics Definitions Laptop Larger batteries Quick Chart QA
Click on any term in blue and bold to go to that term's definition. Click on the mini-menu above to learn more about the details of new lithium battery rules for passengers.
Battery with a sign crossing it out Lithium metal batteries are non-rechargeable batteries you discard once they are depleted. Larger lithium metal batteries contain over 2 grams of lithium, and are forbidden.
single batteryMost consumer lithium metal batteries such as AA, AAA, and CR-123A sizes, do not fall into the "Larger" category. Just follow the Basic rules.
Lithium ion batteries are the rechargeable batteries used in computers, cell phones, and other devices. "Larger" lithium ion batteries are rated between 100 and 300 watt-hours (8-25 g equivalent lithium content, or ELC.) Examples of these larger lithium ion batteries are pictured in the box below.
If you are not sure whether your battery is a larger lithium ion battery, contact the battery's manufacturer, or call the PHMSA Hazardous Materials Info-Center at 1-800-467-4922.
Examples of larger lithium ion batteries (more than 8 but not more than 25 grams of equivalent lithium content (ELC):*
video camera battery 160 watt-hour lithium ion battery for professional audio/visual equipment Laptop and battery 130 watt-hour"universal" lithium ion battery
* Equivalent Lithium Content (ELC) of 8 grams is about 100 watt-hours. ELC of 25 grams is about 300 watt-hours.
You are allowed one larger lithium ion battery installed in a device, plus up to 2 spare larger lithium ion batteries. These are in addition to any smaller lithium ion batteries. For smaller lithium ion batteries, just follow the Basic rules.
Lithium ion batteries rated over 300 watt-hours (25 g ELC) are forbidden.