Can You Take A Rechargeable Battery On A Plane. Airlines often take overweight bags at the departure gate to be stored in the hold. Flashlights over 7 inches will not be allowed into the cabin.

Are you planning on flying with devices or items that contain batteries - especially a lithium ion rechargeable battery. Dont pack regular batteries in a rechargeable battery charger. If you are lucky you may be flying in a newer plane and some now feature usb connectivity for charging during the flight.
Ideally you should keep these in the manufacturers pack as this will ensure that it is not possible for any to become short circuited.
Non-rechargeable batteries are not designed for recharging and become hazardous if placed in a battery charger. The only AA battery that you cant pack in. Lithium ion rechargeable batteries are limited to a rating of 100 watt hours Wh per battery. Also you can carry a maximum of two spares in your carry on bags.
