Can I Bring A Lithium Ion Battery On A Plane. This size covers larger extended-life laptop batteries. You cant carry lithium batteries above 160Wh unless they are for wheelchairs and other mobility aids.

Or alternatively you can pack 1 battery that is between 101 and 300 watt hours. TSA may also allow batteries between 100 and 160Wh to be packed into checked-in baggage with only up to two spare batteries falling within the capacity of the carry on luggage. Lithium batteries are allowed on planes but the rules vary by airline.
TSA may also allow batteries between 100 and 160Wh to be packed into checked-in baggage with only up to two spare batteries falling within the capacity of the carry on luggage.
In each lithium-ion battery there are two compartments that are separated by a thin piece of plastic. External chargers are also considered to be a battery. On the other hand spare lithium ion battery packs including Voltaics V15 V50 and V88 are subject to some limitations please read below. If the cells or battery packs are removed from the device and carried on board the device can remain in checked baggage.

