Smart bags with lithium batteries that do not exceed 0.3g or 2.7Wh are allowed as carry-on or checked luggage.
Some types of batteries can’t be taken onto planes because there are risks with them exploding, catching fire, leaking acid or caustic chemicals, harming people and property. It’s not safe to take them on the plane.
You will be asked to relinquish all dangerous or prohibited items found in your carry-on luggage. If you refuse:
We x-ray bags going on planes to make sure there is nothing dangerous in them. If something comes up on the x-ray that needs checking, the bag will be opened, searched and any dangerous or prohibited item will be removed.