About this replacement
Edan EPM5 / EPM7 / EPM8 Series — 10.8V Li-ion Replacement Battery (01.21.064380)
This is a 10.8V, 3350mAh Li-ion battery for the Edan EPM5, EPM7, EPM8, and SE-1203 patient monitors. It replaces OEM part numbers 01.21.064380 and ID995. These monitors are multi-parameter vital signs devices used in clinical and hospital settings.
- EPM5 / EPM7 / EPM8 platform compatibility: These monitors share the same battery bay geometry, 10.8V nominal rail, and BMS communication protocol. Swapping between models in this family does not require a different battery — the connector, cell configuration, and BMS handshake are consistent across this product line.
- Bench tested on actual hardware: We ran this cell through charge and load cycles on EPM-series hardware. The BMS accepted the new cell without error flags, completed the self-test sequence, and reported correct state-of-charge through the device's battery indicator. No manual BMS reset was required after installation.
- Post-swap startup protocol: After fitting this battery, let the EPM device complete its full power-on self-test without interruption. These monitors run a BMS verification pass at startup — cutting power during that window causes a persistent battery fault flag that will not clear until the device cycles through a complete reboot sequence.
EPM5 battery indicator stuck below 100% after a full overnight charge
The EPM5's charge IC applies a conservative current limit when it sees a new or previously discharged cell for the first time. The cell reaches full voltage, but the fuel gauge algorithm hasn't mapped the cell's actual capacity curve yet. On first charge, the device may report 90–95% and hold there. Run one complete charge-to-discharge-to-charge cycle under normal clinical load, and the gauge will recalibrate to show accurate state-of-charge.
Monitor triggers low battery alarm immediately after confirmed full charge
This happens when the BMS compares the new cell's discharge profile against a threshold calibrated to a well-cycled OEM cell. A fresh cell has slightly different internal resistance, and the BMS can misread this as a degraded pack. It is not a fault with the battery. Run one full charge-discharge cycle before clinical use — after that cycle, the BMS learn routine updates its reference values and the alarm threshold is no longer tripped at full charge. Confirm cell voltage reads 12.0–12.6V at the top of charge before cycling.