Mitoya RL-480 Compatible Battery 7.4V 4400mAh Li-ion

Mitoya RL-480 3000-6000 K — 7.4V Li-ion Replacement Battery

This 7.4V 4400mAh (32.56Wh) Li-ion cell replaces the original battery in the Mitoya RL-480 3000-6000 K LED ring light. The RL-480 runs variable colour temperatures from 3000K to 6000K for photo and video work, and this battery powers that full range without modification. Dimensions are 70.60 × 38.70 × 39.90mm — confirm your original matches before ordering.

• RL-480 platform fit: The RL-480 3000-6000 K draws consistent current across its colour temperature range, and the BMS in this cell is calibrated to the same 7.4V nominal rail and discharge profile as the OEM unit. The connector and housing geometry match the original bay without modification.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the RL-480 platform and monitored BMS behaviour at both the 3000K warm end and 6000K cool end of the output range. The protection circuit held cutoff voltage correctly and did not trip under normal lighting load transitions.
• First-use charge cycle on the RL-480: Run one complete charge cycle through the device before a shoot. The RL-480 reads state of charge from the cell's voltage curve — a partial or interrupted first charge can cause the indicator to misread remaining capacity throughout that session.

Why the RL-480 brightness drops before the battery indicator hits zero

The RL-480 dims output before full cutoff because the driver circuit starts to lose regulation as cell voltage falls below roughly 7.0V under load. At that point, the battery still has charge remaining but can no longer sustain the current the LED array demands at full output. This is a driver behaviour, not a cell fault. If dimming starts earlier than expected, check that the cell is fully charged to 8.4V before the session — a cell that has sat unused for weeks may show a partial state of charge that accelerates this threshold.

Battery percentage jumping erratically on the RL-480 display

This happens when the device's indicator maps its percentage steps against the OEM cell's discharge curve, and the new cell's curve doesn't match exactly at mid-range voltages. The result is jumps — often from 60% to 30% with no warning. It's a firmware mapping issue, not a fault with the cell. Run two full charge-discharge cycles on the RL-480 and the indicator will stabilise as the device recalibrates its reference points against the new cell's actual curve.