This 11.1V, 450mAh 3S 25C LiPo Battery from XProHeli is for the small XPG Brushless Gimbal. The battery is required when using the gimbal standalone, for example when mounting it on one of the handle accessories. In addition, it may be used for certain aerial configurations if you don't want to draw power directly from the aircraft's battery. The battery powers the gimbal for up to an hour, depending on use.
It is a 11.1V, 450mAh 3S lithium-polymer (LiPo) battery that supports up to 25C draw and weighs approximately 1.8 ounces. In addition to the XPG Gimbal, this battery may be used in other applications that call for the same battery specifications. It can be charged using a wide range of standard LiPo balancing chargers fond in the RC modeling world.