NEC NSIO-1000BP Replacement Battery 3.7V 1400mAh Li-ion

NEC NSIO-1000 — 3.7V Li-ion Replacement Battery (NSIO-1000BP)

This 3.7V, 1400mAh Li-ion battery replaces the original NSIO-1000BP cell in the NEC NSIO-1000 digital camera. It restores full camera operation including image capture, video recording, and onboard processing. Dimensions are 53.00 × 35.30 × 11.30mm — physically identical to the OEM cell.

• NSIO-1000 platform fit: The NSIO-1000BP form factor is specific to this NEC camera body. The connector orientation, cell dimensions, and BMS voltage thresholds all match what the camera's power management circuit expects from this single-cell 3.7V configuration.
• Bench tested on actual hardware: We cycled this cell through charge and discharge under camera-body load. The BMS held the upper cutoff at 4.2V and the low-voltage cutoff engaged cleanly before the cell reached unsafe depletion — no mid-session shutdowns during the test run.
• First-cycle conditioning on the NSIO-1000: Charge this cell fully inside the camera body before your first shoot. The NSIO-1000's power management system maps the battery-remaining display to a discharge curve — it needs one complete charge cycle from within the body to calibrate the indicator correctly.

Battery percentage jumping erratically on the NSIO-1000 display

The NSIO-1000 maps its battery indicator to a fixed set of voltage thresholds calibrated to the OEM cell's discharge curve. A new replacement cell may discharge along a slightly different curve — particularly in the mid-range — causing the indicator to skip levels or jump backward. This is a display calibration issue, not a cell fault. Run one full charge and discharge cycle through the camera body and the indicator will track more accurately against the new cell's actual output curve.

Camera showing dead battery icon on a replacement cell that isn't empty

This typically happens when the replacement cell arrives partially discharged and the camera body reads the resting voltage — often sitting around 3.6V — as critically low after extended storage. The camera's low-battery threshold is close to that resting point on a cold or storage-drained cell. Place the battery in the charger and bring it to a full 4.2V before inserting it into the camera. After one complete charge, the body will read and display the cell's state correctly.