About this replacement
CMI C-AS 14.4 — 14.4V Li-ion Replacement Battery (C-ABS 14.4 LI)
This 14.4V Li-ion battery replaces the original pack on the CMI C-AS 14.4 cordless power tool platform. It carries a 2000mAh (28.8Wh) capacity and uses the same connector and BMS communication protocol as the factory unit. Fits drills, impact drivers, and other compact tools running on the C-AS 14.4 system.
- C-AS 14.4 platform fit: These tools share a common 14.4V slide-rail connector and BMS handshake voltage. The pack slots directly into any C-AS 14.4 body without adapter or modification.
- Bench tested on actual hardware: We cycled this pack through repeated motor-start inrush loads on a C-AS 14.4 drill. The BMS held the overcurrent threshold cleanly and did not trip on a cold start.
- First-use load conditioning: On first use, run the tool at half load for two cycles before applying full torque. This lets the BMS profile actual motor inrush current and set overcurrent thresholds accurately before heavy-duty operation.
BMS cutoff on motor-start inrush surge in the C-AS 14.4
When you pull the trigger on a stalled or heavily loaded drill, current spikes sharply in the first milliseconds of motor start. If the BMS has not yet profiled the motor, it may read that spike as a fault and cut the pack. This is especially common with a fresh or recently stored battery where the BMS protection thresholds reset to defaults. Running two partial-load cycles re-establishes the inrush profile and prevents nuisance cutoffs under full torque. After conditioning, cold-start trips on the C-AS 14.4 drop significantly.
Charger not recognising the pack after storage
Li-ion cells that have sat discharged for several weeks can drop below the charger's acceptance voltage window — typically under 2.5V per cell on a 14.4V pack. The charger sees an out-of-range signal and refuses to enter bulk charge mode, often showing a blinking or solid red light. To recover, place the pack on the charger and leave it for 20–30 minutes without removing it — many chargers run a trickle pre-charge cycle that brings cells back above the acceptance threshold before switching to normal charge. If the charger still does not respond after 30 minutes, check rail contact voltage at the pack terminals; it should read above 10V before the charger will accept it.