DJI TB50 Intelligent Battery

Seven of these in the kit, they exist to power the DJI Ronin 4D. The Ronin 4D requires two TB50s mounted simultaneously, and the camera draws hard: realistic runtime per pair is 1.5 to 2 hours depending on Z-axis usage, LiDAR autofocus activity, codec, and ambient temperature. DJI's marketed 2.5 hours is optimistic for normal shooting. With seven batteries and the IN2CH charging hub running continuously on set, we cover a 10-hour Ronin 4D day with three active pairs in rotation and one battery as the floating spare. The TB50 is a smart battery, internal firmware (which has to match the camera's firmware version), self-discharge to ~60% storage state after a configurable number of idle days, built-in self-heating for cold-weather operation, LED gauge on the body, hibernation mode after deep depletion. Cross-platform compatible with the DJI Inspire 2 drone and Ronin 2 gimbal, but firmware versions differ between platforms, moving a battery between systems can throw inconsistent-firmware errors at startup. We rent these only as part of a Ronin 4D package; standalone TB50 rental is unusual.