Fuji VMBPL30A Replacement Battery 7.4V 3400mAh

Fuji VMBPL30A / VMBPL60A — 7.4V Li-ion Replacement Battery

This 7.4V 3400mAh Li-ion cell replaces the original battery in Fuji S1 Pro and S2 Pro digital cameras. It fits both the VMBPL30A and VMBPL60A battery housings at the same voltage and form factor. Capacity is sourced from the product specification — 3400mAh (25.16Wh).

• S1 Pro and S2 Pro platform fit: Both camera bodies share the same 7.4V battery rail, connector pinout, and BMS handshake protocol — which is why one cell covers both models. The voltage threshold for low-battery cutoff is identical across this generation.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge runs on the S2 Pro body. The BMS accepted the cell without error flags, and voltage held above 7.0V through the majority of the discharge curve before the low-battery indicator triggered.
• First-use charge protocol on S-series bodies: Run the first charge cycle inside the camera body or OEM Fuji charger before heavy shooting. Some S-series bodies require one in-body charge cycle to calibrate the battery-remaining display accurately against a new cell's discharge curve.

Battery percentage jumping erratically on the S1 Pro or S2 Pro display

The S-series battery indicator maps percentage to voltage thresholds calibrated against the original cell's discharge curve. A new third-party cell may have a slightly different voltage slope across its capacity range. The camera reads voltage, converts it to a percentage, and if the curve doesn't match its lookup table exactly, the readout skips or jumps — especially between 60% and 30%. Running one full charge-discharge cycle in the camera body lets the BMS re-index against the actual voltage behaviour of the new cell.

Camera shows dead battery indicator on a partially charged replacement cell

This happens when the replacement cell arrives at a low storage voltage — typically below 6.8V — and the S-series BMS reads it as critically depleted rather than simply uncharged. The camera's low-voltage lockout triggers before the cell has had a chance to charge. Place the battery in the OEM Fuji charger for 15–20 minutes to bring it above the 7.0V threshold, then reinsert it into the camera body. The dead battery indicator should clear and normal charging will resume.