Pentax PV-88E Compatible Battery 6V 2100mAh Ni-MH

Pentax PV-88E / PV-100A Series — 6V Ni-MH 2100mAh Replacement Battery

This is a 6V Ni-MH replacement battery rated at 2100mAh (12.6Wh) for Pentax compact cameras including the PV-88E, PV-100A, PV-480, PV-480E, and over 22 additional models. It slots into the original battery compartment and connects to the camera's power rail using the same contact layout as the factory cell. Voltage and capacity match the original specification.

• PV-series camera compatibility: These Pentax compact models share the same 6V battery compartment footprint, contact spacing, and BMS voltage thresholds. A single cell revision covers the full range because the camera body draws from the same power rail across all variants — the BMS handshake reads voltage and cell resistance, not a digital authentication token.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a PV-series body. The BMS accepted the cell on first install, reported a valid charge state, and did not trip a protection cutoff during normal shutter and image-write cycles.
• First-cycle calibration on Ni-MH cells: Run the first charge through the camera body or the OEM charger, not a generic third-party charger. Pentax PV-series cameras calibrate the battery-remaining display against the charge curve on initial cycle — skipping this step causes the indicator to misread remaining capacity from the first session onward.

Why the PV-88E shows a dead battery indicator on a partially charged replacement cell

The PV-series battery indicator maps voltage thresholds to display segments. Ni-MH cells have a flatter discharge curve than some other chemistries, so the camera reads a mid-state-of-charge voltage and treats it as critically low if no calibration cycle has been completed. A new cell arriving at partial factory charge will often trigger this false low-battery warning on first install. Completing one full charge cycle through the camera body resets the threshold mapping and clears the indicator.

Battery percentage jumping erratically during shooting

This happens when the camera's voltage-to-percentage mapping was set against an aged or different-chemistry cell. The PV-series firmware infers remaining capacity from voltage, and a fresh Ni-MH cell has a steeper initial voltage drop followed by a long flat plateau — the camera misreads this as a rapid discharge. It is not a fault with the cell itself. To correct it, discharge the battery fully via the camera, then charge it to 100% in the camera body. After that cycle, the indicator tracks accurately against the actual discharge curve.