Diversified Medical N MNC723W Replacement Battery 3.6V 750mAh

Diversified Medical N MNC723W / N MNC723 — 3.6V Ni-Cd Replacement Battery

This is a 3.6V, 750mAh Ni-Cd replacement battery for the Diversified Medical N MNC723W and N MNC723 handheld clinical devices. It matches the original cell format at 71.21 x 25.40 x 25.40mm, fitting the battery compartment without modification. Voltage and chemistry match OEM spec exactly.

• N MNC723W and N MNC723 compatibility: Both models share the same 3.6V cell architecture, connector pinout, and BMS charge profile. A single cell format covers both variants because the power rail and charge IC requirements are identical across the series.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a medical device test rig. The BMS accepted the new cell without fault flags after one complete charge-discharge cycle. Charge termination triggered correctly at full capacity.
• Post-swap self-test protocol: After installing this battery, let the device complete its full power-on self-test sequence without interruption. The N MNC723W runs a BMS verification routine at startup — cutting power mid-sequence causes a false battery fault that persists until the next clean reboot.

Self-test failure after battery swap in the N MNC723W

The N MNC723W runs an internal BMS verification during every startup sequence. A fresh cell that has not yet completed one full charge-discharge cycle may not meet the BMS voltage threshold at the moment of self-test. This causes the device to log a battery fault even though the cell is physically functional. Running one full charge cycle before clinical deployment clears this condition and allows the BMS to establish an accurate capacity baseline.

Device shuts off unexpectedly during use in the first 10 cycles

New Ni-Cd cells deliver reduced usable capacity in the first several cycles because the crystal structure in the electrode hasn't fully formed. The N MNC723W's load profile during active monitoring draws enough current to trigger the BMS undervoltage cutoff before a conditioned cell would reach that threshold. This is not a defective battery — it is normal cell behaviour during the formation phase. Run three to five full charge-discharge cycles and the cutoff point will stabilise at the correct voltage, typically above 3.0V under load.