About this replacement
Laerdal SimMan 3G Series — 14.8V Li-ion Replacement Battery (212-02033-D)
This 14.8V, 5200mAh lithium-ion battery replaces the internal power pack in the Laerdal SimMan 3G, SimMan 3G Trauma, SimMan Essential, and Nursing Anne Simulator. It matches the OEM voltage rail and connector configuration across all listed platforms. Cross-referenced against part numbers 212-02033-D, 10910, 212-12550, 56637 908 013, and 410-12250.
- SimMan platform compatibility: These simulators share the same 14.8V four-cell Li-ion architecture and BMS handshake protocol. A single battery form factor spans the SimMan 3G, 3G Trauma, Essential, and Nursing Anne lines because Laerdal standardised the power module across this generation of simulators — voltage rail, connector pinout, and BMS communication are identical.
- Bench tested on actual hardware: We cycled this cell through a full charge-discharge sequence and monitored BMS communication under the simulator's load profile. The protection circuit engaged correctly at both the low-voltage cutoff and the charge termination threshold, with no false fault flags during startup verification.
- Power-on self-test protocol: After installing this battery, let the simulator complete its full boot and BMS verification cycle without interruption. Cutting power during this sequence triggers a latched battery fault that the system will report on every subsequent boot until a clean full reboot clears it.
Why the SimMan 3G flags a battery fault after a confirmed full charge
The SimMan 3G's BMS stores a learned capacity model from the original cell. When a new cell is installed, the BMS compares the incoming charge state against its stored baseline — if the new cell's internal resistance profile doesn't match, the controller raises a fault flag rather than accepting the charge reading. This is not a defective battery. One full charge-discharge cycle lets the BMS recalibrate its capacity estimate against the new cell's actual characteristics, and the fault clears after that cycle completes.
Simulator will not power on after battery sat unused in storage
Li-ion cells self-discharge during storage — typically to below 3.0V per cell after several months, which is under the BMS recovery threshold on this platform. When the cell voltage drops that low, the protection circuit locks out discharge to prevent cell damage, and the simulator appears completely dead. Connect the original Laerdal charger and leave it for a minimum of 30 minutes before attempting to power on — the charger applies a low-current pre-charge recovery pulse that brings each cell above the 3.2V unlock threshold before resuming normal charge current.