The DJI BG21 Grip is an add-on accessory for the DJI RS 3 gimbal. It extends the gimbal’s handle and houses an integrated 3000 mAh Li-ion battery that provides up to 12 hours of operation, and supports the 18W PD fast-charging protocol via its USB Type-C charging port. If you use a charger that takes advantage of the aforementioned protocol (not included), you can fully charge the battery in about 2.5 hours.