Philips MobileDiagnost wDR 11.1V Replacement Battery

Philips MobileDiagnost wDR — 11.1V Li-ion Replacement Battery (4512-201-06902)

This 11.1V, 2500mAh Li-ion battery replaces the original power cell in the Philips MobileDiagnost wDR portable digital radiography system. It fits the mobile X-ray unit used for bedside and emergency department imaging. Cross-references OEM part numbers 4512-201-06902, 62841555A, and ZC08040.

• MobileDiagnost wDR fit: The wDR platform uses a single-battery configuration with a fixed 11.1V nominal rail and a proprietary BMS handshake. This cell matches that voltage requirement and connector pinout exactly — no adapter, no modification.
• Bench tested on actual hardware: We cycled this battery through the wDR's power-on self-test sequence and confirmed the BMS handshake completed without fault flags. Charge acceptance across the first three cycles was consistent, and the protection circuit responded correctly to load draw from the imaging subsystem.
• Startup self-test behaviour: After fitting this battery, allow the MobileDiagnost wDR to complete its full power-on self-test without interruption. The device runs a BMS verification routine at startup — cutting power mid-sequence writes a battery fault to the system log that persists until a clean reboot cycle clears it.

Why the MobileDiagnost wDR reports a battery fault after a confirmed full charge

The wDR's charge management IC compares cell state-of-charge against an OEM chemistry baseline stored in firmware. A new replacement cell has not yet established a charge history, so the IC applies a conservative acceptance threshold on the first cycle. The device may flag a low or fault condition even when the cell is fully charged. One complete charge-discharge cycle — run before clinical deployment — allows the BMS to update its internal model and clear the flag on the next startup.

MobileDiagnost wDR won't power on after the battery sat unused in storage

Li-ion cells self-discharge during storage at roughly 2–3% per month. If this battery shipped or sat unused long enough, its resting voltage may have dropped below the wDR's BMS recovery threshold — typically around 9V for an 11.1V pack. At that level, the protection circuit blocks power delivery entirely to prevent cell damage. Connect the battery to a compatible charger and allow a slow recovery charge to bring the pack above 10V before attempting to power on the unit.