Conditions
These batteries must be individually protected to prevent short circuits. Spare batteries must be individually protected (in original retail packaging or by otherwise insulating terminals e.g. by taping over exposed terminals or placing each battery in a separate plastic bag or protective pouch) to prevent short circuits. You must gain approval from your airline before flying.
Quantity limit
No more than two spare batteries to be carried
Airline approval required
Can be carried-on
Can't be checked-in