Storage DesignThis is the charger used for the Insta360 X3 camera(Batteries no include).The case cover can be kept closed,the battery will not be damaged due to exposure,It's easy to carry in a bag. Smart Fast Charging ModeFast charge up to 80% with no over heating issues,It can identify the high and low charge batteries,and allocate the highest power first to fully charge the high charge batteries to meet your needs at the fastest speed.