Bard Medsystem Site Rite 5 10.8V Replacement Battery OM0045

Bard Medsystem Site Rite 5 / Site Rite 6 — 10.8V Ni-MH Replacement Battery (OM0045)

This is a 10.8V, 2100mAh Ni-MH replacement battery for the Bard Medsystem Site Rite 5 and Site Rite 6 portable ultrasound systems. Both units use real-time ultrasound imaging to guide vascular access procedures and require a stable, sustained power supply throughout clinical use. This cell matches the OEM voltage, capacity, and connector spec for both models.

• Site Rite 5 and 6 compatibility: Both models share the same 10.8V battery platform, connector pinout, and BMS handshake protocol. A single battery revision covers both generations without modification.
• Bench tested on actual hardware: We ran this cell through the Site Rite charge-discharge cycle and confirmed the BMS accepted the new cell, reported state-of-charge correctly, and cleared the low-battery flag after one full cycle.
• Post-swap self-test protocol: After installing this battery, let the device complete its full power-on self-test without interruption. The Site Rite runs a BMS verification at startup — cutting power during this sequence triggers a false battery fault that persists until the next complete reboot.

Site Rite BMS learn cycle and why the first charge matters

The Site Rite 5 and 6 use a charge IC that applies a conservative current limit when it sees a new or unfamiliar cell. On the first charge, the BMS samples cell impedance and sets its internal thresholds. If the battery skips a full charge-discharge before clinical use, the BMS may report capacity lower than actual, and the low-battery alarm may trigger early. One complete charge-discharge cycle lets the controller calibrate its state-of-charge model against the real cell chemistry.

Charge indicator stalls below 100% on first charge

This happens because the charge IC defaults to a reduced top-off current when it first encounters a new Ni-MH cell — it interprets the fresh cell's lower internal resistance as a potential fault condition. The controller holds the charge state at 90–95% until it accumulates enough cycle data to trust the cell. Run one full discharge under normal imaging load, then recharge completely. After that cycle, the indicator should reach 100% and hold.