DJI Ronin RS4 Mini Replacement Battery 7.4V 2600mAh

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

This 7.4V, 2600mAh (19.24Wh) lithium-ion battery replaces the OEM pack in the DJI Ronin RS4 Mini three-axis camera gimbal. It slots directly into the RS4 Mini's battery compartment and powers all three brushless stabilisation motors. Cell dimensions are 66.20 × 37.00 × 19.00mm — matching the original form factor.

• RS4 Mini motor system: The RS4 Mini runs three independent brushless motors — pan, tilt, and roll — simultaneously. Each axis draws current on its own load cycle, and peak draw spikes when all three compensate during aggressive camera movement. This pack's BMS handles the combined overcurrent signature the RS4 Mini produces under those conditions.
• Bench tested on actual hardware: We cycled this pack through the RS4 Mini's full initialisation sequence and monitored BMS response under combined three-axis motor load. The protection circuit held stable voltage delivery through rapid pan-and-tilt transitions without tripping into overcurrent lockout.
• Balance before powering on: Balance the gimbal with your camera and lens attached before switching the unit on. An out-of-balance load forces all three motors to run at elevated current continuously — this raises average draw well above spec and can trigger BMS cutoff mid-use.

Gimbal motors cutting out during aggressive pan on a new battery

When all three axes correct simultaneously — particularly during a fast pan with a heavier lens — combined motor peak draw can momentarily spike beyond what the BMS will allow. The protection circuit trips into overcurrent lockout and the gimbal shuts down to prevent cell damage. This is not a faulty battery. Re-balancing the rig for the specific camera-lens combination reduces the per-motor correction load and eliminates most trip events. If cutouts persist after balancing, check that the RS4 Mini's motor strength setting in the DJI Ronin app is not set higher than the payload requires.

Stabilisation drifting or softening before the battery indicator shows low

Voltage sag under simultaneous three-axis motor draw can pull the supply rail below what the RS4 Mini's motor controllers expect, even when the fuel gauge still reads mid-range. The gimbal responds by reducing motor torque output — visible as slow drift or a softening of stabilisation response during active moves. This symptom appears earlier in a battery's life when cells have aged through shallow-cycle use without full discharge. Running the pack to the low-battery warning before recharging, rather than topping it off after every short session, keeps cell capacity calibrated and reduces sag.