DJI Ronin RS4 Mini 7.4V Replacement Battery 3400mAh

DJI Ronin RS4 Mini — 7.4V Li-ion Replacement Battery (HX724-3100-7.2)

This 7.4V, 3400mAh (25.16Wh) lithium-ion battery replaces the original power cell in the DJI Ronin RS4 Mini compact gimbal stabiliser. It slots into the RS4 Mini's battery bay and feeds the three-axis brushless motor system that keeps footage stable during handheld shooting. Voltage and connector match the OEM spec exactly.

• RS4 Mini motor system compatibility: The RS4 Mini runs three brushless motors off a shared 7.4V rail. All three axes draw simultaneously during aggressive moves, so the BMS on this cell is rated to handle combined peak current without tripping on a standard pan-tilt sequence.
• Bench tested on actual hardware: We ran this battery through full initialisation on the RS4 Mini and cycled it through repeated three-axis stabilisation sequences. The BMS held through motor-start surge on each axis and maintained stable output voltage under combined load.
• Balance before powering on: Balance the gimbal properly with your camera attached before switching on. An unbalanced rig forces the motors to work constantly against gravity, drawing sustained high current across all three axes — this accelerates cell depletion and can trigger BMS overcurrent cutoff during fast moves.

Gimbal not initialising correctly after battery swap

The RS4 Mini's IMU runs a startup calibration sequence the moment power is applied. If the battery voltage is low from storage, the IMU may not complete initialisation cleanly, leaving the gimbal in a locked or drifting state. This is not a motor fault — it is the controller failing to establish a stable reference during boot. Charge the replacement battery to at least 7.2V before first use and keep the gimbal still on a flat surface during the 5-second startup sequence.

Stabilisation drift before the battery indicator shows low

The RS4 Mini's battery indicator reads cell voltage at rest, not under load. When all three motors draw simultaneously — common during fast tracking shots — the cell voltage sags below the steady-state reading, and the controller reduces motor torque to protect the system. The result looks like drift or softness in the footage well before the low-battery warning appears. If you see stabilisation degrade during active shooting, check cell voltage under load; below 6.8V under combined motor draw, swap the battery before the next shot.