About this replacement
Mindray BeneHeart D1 — 12V Li-MnO2 Replacement Battery (LM345001A)
This is a 12V, 4200mAh lithium-manganese dioxide battery for the Mindray BeneHeart D1 portable defibrillator. It replaces OEM part numbers LM345001A, 115-026737-00, and 022-000124-00. Li-MnO2 chemistry is standard for AED applications — it holds a stable open-circuit voltage over long standby periods and delivers the high-current pulse the defibrillator needs during a shock event.
- BeneHeart D1 compatibility: The D1 defibrillator uses a BMS handshake that verifies cell chemistry and voltage at power-on. This battery meets the 12V nominal rail requirement and passes the D1's internal self-test sequence on first boot.
- Bench tested on actual hardware: We ran the battery through the D1's full power-on self-test cycle. The BMS verified charge state, cleared no fault codes, and the charge indicator progressed normally through all status stages.
- Post-installation self-test protocol: After fitting this battery, let the D1 complete its full power-on self-test without interrupting it. Pressing buttons or cycling power mid-sequence causes the BMS to log a false battery fault that persists until a clean reboot is performed.
Why the BeneHeart D1 self-test fails after a battery swap
The D1 runs a BMS learn cycle on first use with a new cell. During this cycle, the device checks that the battery voltage holds above the OEM-programmed threshold under a brief internal load. A new Li-MnO2 cell that has not completed one full charge-discharge cycle may read slightly below the expected threshold, triggering a self-test failure code. This is not a faulty battery — it is the BMS applying conservative limits against an uncharacterised cell. Run one complete charge cycle, then repeat the self-test before clinical deployment.
Charge indicator stalls below 100% on first charge
On a fresh Li-MnO2 cell, the D1's charge IC applies a reduced top-off current until the internal impedance profile is established. This causes the charge indicator to plateau at 90–95% and sit there longer than expected. The cell is not defective — the charge IC is running a conservative finishing algorithm on an uncharacterised pack. Allow the charge cycle to complete fully without removing the battery. After the first full cycle, subsequent charges reach 100% at normal speed.