About this replacement
Philips Efficia DFM100 — 14.8V Li-ion Replacement Battery (M6482)
This 14.8V, 6800mAh lithium-ion battery replaces the OEM M6482 cell in the Philips Defibrillator DFM100, DFM-100, and Efficia DFM100. These are automated external defibrillators used in emergency cardiac care settings. The battery must meet the device's BMS handshake and self-test requirements to register as ready for clinical use.
- DFM100 / Efficia DFM100 platform fit: All three listed model names share the same battery bay geometry, connector pinout, and BMS communication protocol. The DFM100 and Efficia DFM100 are the same hardware line across different markets — one cell covers both.
- Bench tested on actual hardware: We cycled this cell through the DFM100 power-on self-test sequence. The BMS authenticated correctly, the charge IC accepted a full charge cycle, and the device cleared its internal battery status flag without manual reset.
- Post-installation self-test protocol: After fitting this battery, allow the DFM100 to complete its full power-on self-test without interruption. The device runs a BMS verification pass at startup — cutting power mid-sequence triggers a persistent battery fault flag that will not clear until the next uninterrupted cold boot.
Device not completing boot sequence on new battery
The DFM100 runs a multi-stage BMS authentication check during boot. A new cell that has not yet completed one full charge-discharge cycle may sit at a state-of-charge the device's charge IC reads as marginal, stalling the boot sequence before the self-test clears. This is not a faulty battery — it is the BMS applying a conservative pass threshold to an unconditioned cell. Run one complete charge cycle to 14.8V, then reinstall and allow the boot sequence to finish without interruption.
Self-test failure after battery swap
After a battery swap, the DFM100 may report a self-test failure even when the new cell is fully charged. The device's BMS learn cycle has not yet mapped the new cell's internal resistance profile, so capacity readings fall outside the expected window and the test fails. This typically resolves after one full charge-discharge cycle gives the BMS enough data to calibrate. Complete that conditioning cycle before returning the unit to clinical use, then confirm the self-test passes and the ready indicator is green.