About this replacement
Black & Decker KC1882FK Series — 18V Ni-MH Replacement Battery (PS145)
This is an 18V Ni-MH replacement battery rated at 2100mAh (37.8Wh) for the Black & Decker KC1882FK cordless drill/driver and related models. It replaces OEM part numbers PS145, A9268, A9277, and A9282. The pack slots into the drill's battery bay and connects to the same charging system as the original.
- KC1882 platform compatibility: The KC1882FK, KC1882F, KC1882CN, and KC1882C share the same 18V battery rail, connector pinout, and BMS handshake protocol — one pack fits the full range without adapter or modification.
- Bench tested on actual hardware: We cycled this pack on a KC1882FK drill, monitoring cell voltage under repeated trigger pulls. The BMS held stable across motor-start inrush spikes and sustained fastening loads without nuisance trips.
- Ni-MH break-in on the KC1882: On first use, run the drill at half load for two cycles before pushing full torque applications. This lets the BMS profile the motor's inrush current draw and set accurate overcurrent thresholds before you hit it with maximum load.
BMS cutoff on KC1882FK motor-start inrush surge
The KC1882FK's motor pulls a short but sharp current spike the moment the trigger engages — this is inrush current, and it can exceed the BMS overcurrent threshold on a new or cold pack. On a new Ni-MH pack, internal resistance is slightly elevated before cells have been cycled. That higher resistance amplifies the voltage sag during inrush, which the BMS can read as an overcurrent event and trip. Running two partial-load cycles first brings cell resistance down and gives the BMS an accurate baseline so it stops cutting out on trigger pull.
Charger not recognising the new pack after storage
Ni-MH packs stored for extended periods can self-discharge below the voltage floor that the Black & Decker charger needs to accept a charge cycle — typically below around 1.0V per cell. When that happens, the charger sees a voltage it won't recognise as a valid pack and either does nothing or blinks an error. A brief manual trickle charge at low current (around 0.1C) can bring cell voltage back above the acceptance threshold. Once cells read above that floor, reseat the pack in the charger and it should begin a normal charge cycle.