Laerdal Resusci Anne QCPR 7.4V 2600mAh Compatible Battery

Laerdal Resusci Anne QCPR — 7.4V Li-ion Replacement Battery (171-40023)

This 7.4V 2600mAh Li-ion battery replaces the internal power cell in the Laerdal Resusci Anne QCPR CPR training manikin. It powers the manikin's chest compression feedback system, including depth sensing, rate monitoring, and hand position detection. When the original cell loses charge capacity, training sessions cut short and feedback data becomes unreliable.

• Resusci Anne QCPR feedback system: The QCPR platform draws continuous current across its sensor array and Bluetooth telemetry module simultaneously. This battery matches the voltage rail and connector format the BMS expects — preventing a mismatch that would trigger a false fault and lock out the feedback display mid-session.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the QCPR platform and confirmed the BMS handshake completed without faults. The protection circuit handled the manikin's sensor load without tripping cutoff on startup.
• Post-swap power-on sequence: After installing this battery, let the manikin complete its full power-on self-test without interrupting it. The BMS runs a verification cycle at startup — cutting power during this window registers a false battery fault that persists until the next clean reboot.

Why the Resusci Anne QCPR alarms low battery immediately after a full charge

The QCPR's charge IC compares cell state against a stored threshold calibrated to the OEM cell's chemistry profile. A new replacement cell hasn't completed its first full charge-discharge learn cycle, so the BMS reads its resting voltage as below the pass threshold and triggers the alarm. This isn't a fault with the battery — it's the BMS applying a conservative limit to an uncalibrated cell. Run one complete charge-to-discharge cycle before using the manikin in a training session; after that cycle, the alarm clears and the charge indicator reads accurately.

Resusci Anne QCPR won't power on after the battery sat in storage

Li-ion cells self-discharge during storage, and if a cell drops below approximately 2.5V per cell (5.0V pack), the BMS enters deep-discharge lockout and blocks normal power-on to protect the cell from damage. Plugging in the charger won't immediately restore function — the charge IC needs to detect sufficient voltage before it initiates a full charge cycle. Leave the battery connected to the charger for at least 30 minutes to allow the pre-charge trickle current to bring the pack above the recovery threshold, then attempt a normal charge cycle. If the manikin still won't power on after a full charge, check that pack voltage reads at least 7.0V before reinstalling.