Large Capacity
This unit comes with 2 Top Flat lithium-ion 18650 batteries.
One batteries can work for 3 to 6 hours after a full charge, while two combined will last for 6 to 9.
NOTICE: Please kindly remove the PLASTIC FILM before use.
This battery is Top flat rechargeable 18650 li-lion battery, other regular battery is not compatible with this fan.