Vocera Badge B3000 Replacement Battery 3.7V 950mAh

Vocera Communications Badge B3000 Series — 3.7V Li-Polymer Replacement Battery (230-02020)

This 3.7V, 950mAh lithium polymer cell replaces OEM part 230-02020 and 230-01924 in the Vocera Communications Badge B3000, B3000N, and B3000E. These badges are wearable communication devices used in clinical environments for staff messaging and patient alerting. Capacity is 3.52Wh — matched to the original specification.

• B3000, B3000N, and B3000E compatibility: All three variants share the same battery bay dimensions, 3.7V voltage rail, and BMS handshake protocol. The connector and cell format are identical across this badge family, so one cell covers all three models.
• Bench tested on actual hardware: We cycled this cell through the B3000 BMS at full charge and discharge. The BMS accepted the cell without fault codes on the first cycle, and charge termination triggered correctly at full capacity.
• Post-swap self-test requirement: After installing this battery, let the badge complete its full power-on self-test without interruption. The BMS runs a chemistry verification sequence at startup — interrupting it before the badge reaches the main menu can register a false battery fault that persists until a clean reboot.

Why the B3000 alarms low battery immediately after a confirmed full charge

The B3000 BMS stores charge threshold data calibrated to the OEM cell's internal resistance profile. A new replacement cell has a slightly different impedance signature on its first cycle, which can cause the BMS to read state-of-charge conservatively and trigger the low-battery alarm prematurely. This is not a fault with the cell — it is a calibration gap. Run one complete charge-to-discharge cycle and the BMS recalibrates to the new cell's profile. After that first cycle, alarm thresholds return to normal.

Badge will not power on after the replacement cell sat in storage

Lithium polymer cells self-discharge during storage. If this cell dropped below approximately 2.5V before installation, the B3000 BMS may refuse to boot as a protection measure against deep-discharged cells. Connect the badge to its charger and leave it for at least 30 minutes before attempting to power on — the charger applies a low-rate pre-charge current to recover cells below the BMS boot threshold. Once the cell climbs back above 3.0V, the BMS re-enables the power circuit and the badge will start normally.