About this replacement
Black & Decker HP14KD Series — 14.4V Ni-MH Replacement Battery (A9262)
This is a 14.4V, 3000mAh Ni-MH replacement battery for the Black & Decker HP14KD cordless drill/driver and over 170 compatible models in the same voltage family. It slots into the original battery bay and connects to the same contact plate as the factory pack. Capacity is rated at 43.2Wh.
- HP14KD and CD14 series compatibility: These models share the same 14.4V rail, contact pin layout, and BMS handshake protocol — the charger reads cell voltage through the same thermistor circuit across the entire platform.
- Bench tested on actual hardware: We ran this pack through full charge-discharge cycles on an HP14KD and a CD14CA. The BMS responded correctly to motor-start inrush current and the charger terminated at the expected delta-V threshold without false cutoff.
- Break-in load profile: On first use, run the drill at half load for two cycles before full torque applications — this lets the BMS log the motor inrush draw and calibrate its overcurrent threshold before you hit the drill press hard.
BMS overcurrent trip on trigger-pull inrush in the HP14KD
The HP14KD motor draws a sharp current spike the instant the trigger fires — this inrush can hit three to five times the steady running current. A new Ni-MH pack with no load history has conservative BMS thresholds that may flag this spike as a fault. The BMS latches off and the tool goes dead mid-pull. Running two half-load break-in cycles lets the BMS raise its overcurrent window to match the motor's actual inrush signature.
Charger won't recognise the new pack after storage
Ni-MH packs in storage self-discharge — if the cell voltage drops below roughly 1.0V per cell, most Black & Decker 14.4V chargers refuse to start a charge cycle. The charger reads the pack as defective rather than deeply discharged. To recover it, apply a short manual top-up with a compatible universal charger set to Ni-MH at 0.1C until the pack reaches 1.2V per cell. Once the voltage crosses the acceptance threshold, the original charger will recognise and complete the cycle normally.