Philips Remote Control W13 Replacement Battery 3.6V 800mAh

Philips Remote Control W13 — 3.6V Ni-MH Replacement Battery (451213302914)

This 3.6V, 800mAh Ni-MH rechargeable battery replaces the original cell in the Philips Remote Control W13. The W13 is a wireless remote used with Philips medical monitors and diagnostic equipment, allowing clinicians to operate the device from a distance. Dimensions are 46.00 × 31.60 × 10.90mm — confirm against the existing cell before fitting.

• W13 remote compatibility: The W13 remote runs a 3.6V Ni-MH cell with a specific charge profile managed by the host device's charge IC. Swapping to a different voltage or chemistry will cause the charge IC to misread the cell state, producing persistent low-battery flags regardless of actual charge level.
• Bench tested on actual hardware: We cycled this cell through the W13 remote's charge and load profile. The BMS cleared all fault flags after one complete charge-discharge cycle, with terminal voltage holding at 3.6V under the remote's transmit load.
• Post-installation self-test cycle: After fitting the new cell, allow the Philips host device to complete its full power-on self-test without interruption. The BMS runs a chemistry verification check at startup — interrupting this sequence logs a false battery fault that persists until the next clean reboot.

Medical device alarming low battery with a freshly charged replacement

Philips medical equipment applies OEM-calibrated BMS thresholds tuned to an aged cell's charge signature. A new Ni-MH cell has a slightly different charge curve on its first few cycles, so the BMS can read it as below threshold even when it is fully charged. This is not a cell fault — it resolves after one complete charge-discharge cycle run outside clinical use. Once the BMS has logged a full cycle, the alarm clears and voltage readings stabilise at the correct level.

W13 remote not powering on after the battery sat in storage

Ni-MH cells self-discharge during storage. If the cell voltage drops below approximately 1.0V per cell, the host device's BMS enters a protection state and refuses to initiate a charge cycle. Place the battery on a standalone Ni-MH charger capable of recovery charging at a low current — typically 0.1C — until the cell reaches around 1.2V per cell. Once that threshold is cleared, reinstall the battery and allow the host device to complete a normal full charge before use.