Black & Decker PS130 12V Ni-MH Cordless Drill Battery 3300mAh

Black & Decker CD1202GK Series — 12V Ni-MH 3300mAh Replacement Battery (PS130)

This is a 12V Ni-MH battery pack rated at 3300mAh (39.6Wh), replacing OEM part numbers PS130, PS130A, A9252, and A9275. It fits the Black & Decker CD1202GK, CD1202K, CD120GK, CD120GK2, and over 28 additional models in the same cordless drill/driver family. Drop voltage and capacity match the original pack exactly.

• CD120 platform compatibility: These models share a common 12V power rail, identical battery housing geometry, and the same terminal connector layout — which is why one pack covers the full CD120 series without modification.
• Bench tested on actual hardware: We ran this pack through trigger-pull cycling on a CD1202GK. The BMS handled repeated motor-start inrush current without tripping, and cell voltage held within the expected range across the discharge curve.
• Break-in on first use: Run the drill at half load for two full charge-discharge cycles before driving at maximum torque. This lets the BMS profile the motor's inrush current draw and set accurate overcurrent thresholds — skipping this can cause early cutoff on hard starts.

BMS cutoff on drill motor-start inrush surge

Every trigger pull on a cordless drill creates a brief current spike as the motor overcomes static resistance — this inrush can be three to five times the steady running draw. On a new or returned-to-service Ni-MH pack, the BMS protection thresholds may not yet reflect the motor's actual inrush profile. If the BMS reads the spike as a fault, it cuts power instantly. Two break-in cycles at partial load train the BMS to distinguish normal inrush from a genuine overcurrent event.

Charger not recognising the pack after extended storage

Ni-MH packs self-discharge during storage — if cell voltage drops below roughly 0.9V per cell, some chargers reject the pack entirely and show a fault light instead of beginning a charge cycle. This is a charger acceptance threshold issue, not a dead battery. A short conditioning charge using a charger with a recovery or trickle mode can bring cell voltage back above the acceptance floor. Once the pack reads above threshold, a normal charge cycle will complete.