This is a pack of 3 batteries from Zhiyun-Tech for use with some of their camera gimbals such as CRANE 3S/SE, CRANE 3 LAB, WEEBILL-S, and WEEBILL LAB. Sold separately from what comes with the gimbal, these batteries are replacement or spares for your gimbal. Each 18650 battery features a 2600mAh capacity. The GMB-B117 2-pack replaces the earlier GMB-B83 selection.