About this replacement
Bionet BM1 Vet — 10.8V Li-ion Replacement Battery (BM1-BAT)
This 10.8V 2600mAh Li-ion battery replaces the original pack in the Bionet BM1 Vet portable veterinary patient monitor. It fits the BM1 Vet directly and matches the OEM voltage rail, capacity, and connector. Use the part number BM1-BAT or BN180226 to confirm compatibility before ordering.
- BM1 Vet platform fit: The BM1 Vet runs a single battery bay at 10.8V with a BMS handshake that authenticates cell voltage on startup. This pack matches that voltage rail and communicates with the device's charge IC without triggering an authentication fault.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the BM1 Vet platform. The BMS accepted the cell, completed its verification sequence, and the charge indicator advanced normally through all stages without error flags.
- Post-swap startup protocol: After installing this battery, let the BM1 Vet complete its full power-on self-test without interrupting it. The device runs a BMS verification check at boot — cutting power mid-sequence logs a false battery fault that persists until the next clean reboot from a fully charged state.
BM1 Vet self-test failure after battery swap
The BM1 Vet runs a BMS learn cycle at startup to profile the new cell. A freshly installed Li-ion pack that hasn't completed a full charge-discharge cycle doesn't yet have calibrated capacity data for the device to read. This causes the self-test to flag the battery as unverified or faulted. Run one complete charge to full, then allow the device to discharge under normal use before relying on battery readings in a clinical setting. After that first cycle, the BMS has a baseline and self-test passes cleanly.
Charge indicator stalls below 100% on first charge
On the first charge, the BM1 Vet's charge IC applies a conservative current limit to a new cell — this is normal behaviour and not a fault. The indicator can stall at 90–95% for an extended period before the charge controller switches to trickle and then terminates. Do not remove the battery early or assume the charge has failed. Leave the device on charge until the indicator confirms full charge completion, typically when the charge LED shifts state or the display reads 100%.