Siemens Mobilett Mira 11.1V Replacement Battery 4512-201-06902

Siemens Mobilett Mira — 11.1V Li-ion Replacement Battery (4512-201-06902)

This 11.1V 2500mAh Li-ion battery is a direct replacement for the Siemens Mobilett Mira mobile X-ray system. It fits the portable radiography unit used in hospitals and clinics for bedside and intraoperative imaging. Cross-references include OEM part numbers 62841555A and ZC08040.

• Mobilett Mira platform fit: The Mobilett Mira draws from a single battery rail at 11.1V nominal. The BMS on this unit performs a chemistry handshake at power-on — the cell must match the expected voltage window and internal resistance profile or the device will flag a battery fault before the boot sequence completes.
• Bench tested on actual hardware: We ran this cell through the Mobilett Mira power-on self-test cycle. The BMS accepted the battery without fault codes, completed its verification pass, and the charge IC reached full state of charge on the first cycle.
• Post-swap startup protocol: After installing this battery, let the Mobilett Mira complete its full power-on self-test without interrupting the sequence. The device runs a BMS verification check at startup — cutting power during this window writes a false battery fault flag that persists until the next clean reboot cycle.

Why the Mobilett Mira flags a battery fault on a new cell

The Mobilett Mira BMS stores an expected internal resistance baseline from the previous cell. A new Li-ion cell has a different resistance profile at first, even at the correct voltage. This mismatch can trigger a battery fault flag on the first one to three power cycles. Run one full charge-discharge cycle and the BMS recalibrates its baseline to the new cell — the fault clears on its own without any technician reset.

Charge indicator stuck below 100% after first full charge

On the first charge, the Mobilett Mira charge IC applies a conservative current limit to an unrecognised cell, which causes it to terminate early before the cell actually reaches peak capacity. The indicator reads 90–95% even after a full overnight charge. Run one complete charge-discharge-recharge cycle and the charge IC adjusts its termination threshold — the indicator will reach 100% from the second charge onward. If it still reads below 95% after three full cycles, check that the dock contacts are clean and making firm contact.