About this replacement
Black & Decker PD600 Series — 6V Ni-MH Replacement Battery (5102993-00)
This is a 6V Ni-MH replacement battery rated at 2000mAh (12Wh) for the Black & Decker PD600, PD600G, and PD700G cordless drill/drivers. It uses the OEM part number 5102993-00 and fits directly into the original battery cradle. When your original pack no longer holds a charge, this brings the drill back to full working order.
- PD600, PD600G, and PD700G compatibility: All three models run off the same 6V battery rail and use the same connector and cradle geometry. The BMS handshake requirements are identical across this series, so one pack covers all three.
- Bench tested on actual hardware: We cycled this pack through full charge and discharge runs on a PD600 platform. The BMS held within the expected 6V discharge window and recovered cleanly through repeated charge cycles without voltage drop-off.
- Ni-MH break-in on first use: Run the drill at half load for the first two cycles before pushing it to full torque. This lets the BMS profile the motor's inrush current draw and set its overcurrent thresholds accurately before you hit peak demand.
BMS cutoff on motor-start inrush in the PD600
When you pull the trigger on a Ni-MH pack that hasn't been fully conditioned, the motor's start-up inrush current can spike well above the steady-state draw. The BMS reads that spike as an overcurrent event and cuts power before the motor even gets up to speed. Ni-MH cells are more sensitive to this than Li-ion because their internal resistance is higher at low state-of-charge. Running two full break-in cycles at reduced load trains the BMS to distinguish normal inrush from a genuine fault.
Drill bogs under load after the pack sits unused for weeks
Ni-MH cells self-discharge faster than Li-ion — this pack can lose a significant portion of its charge sitting on a shelf for three to four weeks. When you pull the trigger on a partially discharged pack, voltage sags under load and the drill loses torque mid-use. The fix is a full charge before use after any storage period. Put the pack on the charger until the charge light goes solid, then verify the resting voltage reads at or close to 6V before using it under load.