Olympus RC6000 Replacement Battery 6V 4200mAh Ni-MH

Olympus RC6000 / VM380 / VN3000 Series — 6V Ni-MH Replacement Battery

This is a 6V, 4200mAh Ni-MH replacement battery for the Olympus RC6000 and related camera models including the VM380, VM385, and VN3000. It slots into the same battery bay as the original cell and connects to the same voltage rail the camera's sensor, processor, and display draw from. Voltage and chemistry match the OEM specification exactly.

• RC6000 / VM380 / VM385 / VN3000 platform fit: These models share the same 6V battery bay dimensions and draw power through the same connector orientation. The camera's power management circuit expects a Ni-MH cell delivering a consistent 6V nominal — Li-ion alternatives at different nominal voltages will not behave correctly here.
• Bench tested on actual hardware: We cycled this cell under a load profile that included display-on, sensor active, and repeated write cycles to simulate continuous use. The BMS held voltage within spec throughout discharge and did not trigger premature low-battery cutoff before the cell reached its actual depletion point.
• First charge protocol on Olympus Ni-MH bodies: Run the first full charge through the OEM charger or camera body before shooting. Some Olympus bodies recalibrate their battery-remaining indicator during this initial charge cycle — skipping it can cause the indicator to read incorrectly from the first shot onwards.

Camera showing dead battery indicator on a partially charged replacement cell

Ni-MH cells have a flatter discharge curve than Li-ion, and some Olympus bodies map their battery indicator against a voltage threshold curve calibrated to the original cell's age and internal resistance. A fresh replacement cell with low internal resistance can register differently to what the indicator algorithm expects, causing it to display empty even when the cell has significant charge remaining. This is a calibration mismatch, not a fault with the cell. Run one full charge-discharge cycle through the camera body to let the indicator recalibrate. After one complete cycle, the display should track the actual charge state accurately.

Battery percentage jumping erratically between shots

If the battery percentage display jumps — say, from 80% to 40% between shots — the camera's voltage-threshold indicator is misreading the discharge curve of the new cell. This typically happens when the camera body has stored a discharge profile from a worn original cell with higher internal resistance. The new cell sits at a different open-circuit voltage at each state of charge, which the camera interprets as erratic. Charge fully to 100%, then shoot the cell down to camera-shutoff, and charge again — one full cycle resets the reference point the indicator uses to map remaining charge.