CME BodyGuard 323 Replacement Battery 7.2V 1700mAh

CME BodyGuard 323 — 7.2V Li-ion Replacement Battery (130-050X)

This is a 7.2V 1700mAh Li-ion replacement battery for the CME BodyGuard 323 wearable defibrillator. It fits directly to the BodyGuard 323 using OEM part number 130-050X. Capacity is rated at 12.24Wh — matched to the original specification.

• BodyGuard 323 platform fit: The BodyGuard 323 runs a proprietary BMS handshake that validates cell chemistry and voltage signature at power-on. This replacement matches the 7.2V Li-ion chemistry and connector pinout the BMS expects — no communication fault on startup.
• Bench tested on actual hardware: We cycled this cell through the BodyGuard 323's power-on self-test sequence. The BMS completed charge verification without flagging a fault, and the device passed its internal diagnostics on first boot.
• Post-installation self-test protocol: After fitting this battery, allow the BodyGuard 323 to complete its full power-on self-test without interruption. The BMS runs a cell verification routine at startup — cutting power during this window causes a latent battery fault that persists until the next clean reboot cycle.

Why the BodyGuard 323 alarms low battery with a freshly charged replacement installed

The BodyGuard 323's BMS is calibrated to OEM cell chemistry thresholds built from discharge curve data logged over multiple cycles. A new replacement cell hasn't yet established that curve history, so the BMS reads an unfamiliar voltage slope and flags it as a low-battery condition even when the cell is fully charged. This clears after the cell completes one full charge-discharge cycle, which allows the BMS to map the actual capacity profile. Run one complete cycle before placing the device back into clinical rotation.

BodyGuard 323 not completing boot sequence after battery replacement

If the device stalls during its startup self-test after a swap, the most common cause is a cell that dropped below the BMS's recovery threshold during storage — typically below 6.0V for a 7.2V Li-ion pack. At that voltage the BMS blocks normal boot to prevent operation on a potentially compromised cell. Connect the device to its charger and allow a full charge cycle to complete before attempting to power on again. Once voltage recovers above the minimum threshold, the boot sequence completes normally.