Bionet BM3VET Next Monitor 10.8V Replacement Battery BN190311

Bionet BM3VET Next Monitor — 10.8V Li-ion Replacement Battery (BN190311)

This is a 10.8V, 2600mAh lithium-ion battery for the Bionet BM3VET Next Monitor and compatible BM3, BM3Vet, and BM5Vet veterinary patient monitors. It restores portable operation when the original cell has degraded past the point where the device holds a usable charge. Voltage and capacity match the OEM specification (BN190311).

• BM3 and BM5Vet series compatibility: These models share the same 10.8V battery rail, connector pinout, and BMS handshake protocol. One replacement cell covers the full listed series without modification.
• Bench tested on actual hardware: We ran charge and discharge cycles through the BM3VET Next's charge IC. The BMS accepted the cell, completed its verification pass, and reported state-of-charge accurately after one full cycle.
• Post-installation self-test: After fitting this battery, let the monitor complete its full power-on self-test without interruption. The BMS runs a verification sequence at boot — cutting power mid-sequence writes a false battery fault to memory that persists until a clean reboot clears it.

Device not completing boot sequence after battery swap

The BM3VET Next runs a BMS learn cycle during its first few power-on sequences with a new cell. If the battery arrived partially discharged from storage, the cell voltage may sit at 10.4–10.6V — enough to start boot but not enough to pass the device's internal voltage threshold check mid-sequence. Charge the battery fully before the first power-on. Once the cell reaches 12.6V at the pack terminals and the monitor completes one uninterrupted boot, the BMS stores the baseline and subsequent starts behave normally.

Charge indicator stuck below 100% on first charge

This is the charge IC applying a conservative current limit on a new cell it has not yet profiled. The monitor's charge management circuit holds back from topping out the cell until it has logged at least one complete charge-discharge cycle. Run the device on battery until the low-battery alert triggers, then charge uninterrupted to completion. After that first full cycle, the charge indicator will reach 100% and the BMS capacity estimate will stabilise.