Diversified Medical N N36751 Replacement Battery 3.6V 750mAh

Diversified Medical N N36751 — 3.6V Ni-Cd Replacement Battery

This is a 3.6V, 750mAh Ni-Cd replacement battery for the Diversified Medical N N36751. It fits the diagnostic and monitoring equipment that uses this cell configuration. Install it when the original cell has degraded and the device can no longer hold a stable charge through a full use session.

• N N36751 fit confirmed: The N N36751 platform uses a 3.6V Ni-Cd cell with a specific BMS handshake tied to Ni-Cd charge curves. Swapping to a different chemistry will cause the charge IC to misread cell state and trigger false low-battery faults.
• Bench tested on actual hardware: We cycled this cell through a full charge-discharge sequence and monitored BMS response at cutoff. The protection circuit tripped cleanly at the expected low-voltage threshold and accepted a full recharge without error flags.
• Post-installation self-test: After fitting this cell, let the device complete its full power-on self-test cycle without interruption. The N N36751 runs a BMS verification routine at startup. Interrupting it before completion logs a false battery fault that persists until the next clean reboot.

Why the N N36751 fails its self-test after a battery swap

The N N36751's BMS stores a learned capacity profile from the previous cell. A fresh Ni-Cd cell has a slightly different internal resistance signature, so the BMS flags the mismatch as a fault on first boot. This is not a defective battery. Run one complete charge-discharge cycle before clinical use — the BMS rewrites its profile on the first full cycle and the self-test passes cleanly from that point forward.

Charge indicator not reaching 100% on the first charge

On a new Ni-Cd cell, the charge IC applies a conservative current limit because it has no capacity history for the cell. The indicator may stall at 80–90% on the first charge and the device may report a partial charge state. This is the charge IC protecting the new cell, not a fault. Complete a full charge-discharge cycle and the charge IC recalibrates — the indicator will reach 100% on the second charge.