About this replacement
Innomed Cardio Aid 200B — 12V Ni-MH Replacement Battery (110460-U)
This is a 12V, 3000mAh Ni-MH replacement battery for the Innomed Cardio Aid 200B and Cardio Aid 200 portable defibrillators. It matches OEM part numbers 110460-U, R-2003-1, and R-2003-2. The battery powers both the defibrillation discharge circuit and the device's continuous monitoring functions.
- Cardio Aid 200 and 200B compatibility: Both models share the same 12V battery bay, connector pinout, and BMS handshake protocol — one cell chemistry serves both units without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Cardio Aid 200B platform. The BMS handshake completed normally, charge acceptance matched OEM spec at 12V, and the device passed its internal self-test routine without error codes.
- Post-swap self-test protocol: After installing this battery, let the Cardio Aid run its full power-on self-test without interruption. The BMS runs a verification sequence at startup — cutting power during this window creates a false battery fault flag that persists until the next complete reboot cycle.
Why the Cardio Aid 200B triggers a low-battery alarm on a fully charged new cell
The Cardio Aid 200B BMS sets its alarm threshold based on voltage curves it learned from the previous cell. A new Ni-MH cell has a slightly different internal resistance profile in its first few cycles, which causes the BMS to read voltage sag under load as a low-capacity condition. This is not a fault with the replacement cell. Run one complete charge-discharge cycle and the BMS recalibrates its threshold to the new cell's actual curve — the alarm clears on its own.
Cardio Aid 200B not completing boot sequence after battery swap
If the replacement cell sat in storage, self-discharge can drop it below the Cardio Aid's BMS recovery threshold — typically below 10.5V on a 12V Ni-MH pack. At that voltage, the BMS blocks the boot sequence entirely rather than risk a failed defibrillation cycle during clinical use. Connect the charger and let the unit charge uninterrupted for a full cycle. Once the cell recovers above 11V, the BMS releases the boot block and the device starts normally.