Riely CP1223C 12V 2300mAh Sealed Lead Acid Replacement Battery

Riely CP1223C — 12V Sealed Lead Acid Replacement Battery

This is a 12V 2300mAh (27.6Wh) sealed lead-acid battery for the Riely CP1223C portable medical device. It fits monitoring equipment and emergency medical instruments that share this voltage and form factor. The sealed construction prevents acid leakage during transport and during normal clinical handling.

• CP1223C platform fit: Medical devices in this class run a 12V bus with a BMS that performs a chemistry-specific handshake at startup. This battery matches the voltage rail and cell chemistry the CP1223C expects — deviating on either causes the device to reject the pack during its power-on self-test.
• Bench tested on actual hardware: We cycled this battery under a load profile that replicates the CP1223C's startup draw and sustained monitoring current. The BMS held voltage within spec across the discharge curve and recovered cleanly after a simulated deep discharge.
• Startup self-test behaviour: After installation, let the device complete its full power-on self-test without interruption. Medical devices run a BMS verification sequence at boot — cutting power mid-sequence registers a false battery fault that persists until the next full reboot cycle.

Self-test failure after battery swap on the CP1223C

The CP1223C runs a BMS learn cycle on first install to calibrate against the new cell's internal resistance and charge state. A freshly shipped SLA cell typically sits at a partial state of charge — around 12.4–12.6V open circuit — which can fall below the device's self-test pass threshold. This causes the device to flag a battery fault even when the cell is functional. Run one full supervised charge before the first clinical use to allow the BMS to complete its calibration pass.

Charge indicator not reaching 100% on the first charge cycle

This is a known behaviour with new SLA cells on medical-grade charge controllers. The charge IC applies a conservative absorption voltage limit on the first cycle because the cell's internal resistance profile is uncharacterised. The indicator typically stalls between 85–95% and holds there for an extended period before the controller accepts the cell and completes the charge. Allow the device to complete the full charge cycle uninterrupted — subsequent cycles will reach 100% normally once the charge IC has logged the cell's response curve.