ITT NP-552 Replacement Battery 6V 4200mAh Ni-MH

ITT NP-552 / NP-554 / V8-130 / V8-230 — 6V Ni-MH Replacement Battery

This is a 6V, 4200mAh Ni-MH replacement battery for ITT camera models including the NP-552, NP-554, V8-130, and V8-230 series. It matches the original cell's voltage and chemistry, keeping the camera body's power management system satisfied. Capacity is sourced from product data at 25.2Wh.

• NP-552 / NP-554 / V8-series fit: These models share the same 6V Ni-MH voltage rail and physical battery bay dimensions, which is why one cell covers the full range. The connector pinout and BMS voltage thresholds are consistent across this camera family.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge passes on compatible camera bodies. The BMS accepted the cell without triggering a rejection flag, and the charge circuit behaved normally across all test cycles.
• First-install charge cycle on NP-series bodies: On initial install, run a full charge from within the OEM charger or camera body before shooting. Some ITT NP-series bodies need one full in-body charge cycle before the battery-remaining display reads accurately on a new cell.

Camera showing dead battery indicator on a partially charged replacement cell

ITT NP-series bodies map battery percentage against a voltage discharge curve calibrated to the original cell. A new Ni-MH replacement has a slightly different discharge curve until it completes a few cycles, so the indicator can read low even when the cell holds a strong charge. This is a display calibration issue, not a cell fault. After two to three full charge-discharge cycles, the readout typically stabilises. If the indicator still reads empty at rest, check resting voltage — a healthy Ni-MH cell at full charge should sit at approximately 1.4V per cell, totalling around 8.4V across a 6-cell pack.

Flash not fully recycling between shots on a new battery

Flash recycling draws a large burst of current to recharge the capacitor between frames. A new Ni-MH cell that has not completed its first few conditioning cycles delivers slightly lower peak current than a broken-in cell, which can extend recycle time. This is most noticeable in burst shooting or studio-style rapid flash work. Run three full charge-discharge cycles before heavy flash use — peak current delivery improves measurably once the cell chemistry stabilises. If recycling lag persists after conditioning, confirm the cell voltage under load stays above 5.4V.