AEG 2000 9.6V Ni-MH Replacement Battery 3300mAh

AEG 2000 Series — 9.6V Ni-MH Replacement Battery (4 932 353 638)

This is a 9.6V Ni-MH battery rated at 3300mAh (31.68Wh) for the AEG 2000 cordless drill/driver and compatible models including the BEST 9.6X, BEST 9.6X Super, BX9.6, and BXS9.6. It slots into the same battery bay as the original AEG pack. OEM part numbers covered include 4 932 353 638, 4 932 366 429, B9.6, BX9.6, BXS9.6, and MX9.6.

• AEG 9.6V platform fit: The 2000, BEST 9.6X, and BXS9.6 all run the same 9.6V rail with the same contact layout and latch geometry. One battery pack spans the range without adapter changes or connector modification.
• Bench tested on actual hardware: We cycled this pack through full charge and discharge on a 9.6V AEG-platform drill, monitored cell voltage across the Ni-MH stack under motor-start inrush, and confirmed the pack held rail voltage without tripping the overcurrent threshold at trigger pull.
• Motor inrush conditioning on first use: On first use, run the drill at half load — light drilling, no high-torque fastening — for the first two cycles. Ni-MH cells need those early cycles to reach full charge acceptance, and starting at partial load prevents a premature thermal cutoff before the pack has been properly conditioned.

BMS cutoff on AEG 2000 motor-start inrush surge

When you pull the trigger on the AEG 2000, the motor draws a short inrush spike — often three to five times the running current — before settling to steady-state draw. On a new or freshly stored Ni-MH pack, internal resistance is temporarily elevated, which amplifies the voltage sag at that spike. If the pack's protection circuit reads that sag as an overcurrent event, it cuts out immediately on trigger pull. Conditioning the pack through two partial-load cycles drops internal resistance and prevents false cutoffs on subsequent use.

Charger not recognising the new pack after storage

Ni-MH packs that have sat in storage can self-discharge below the threshold some AEG chargers require to begin a charge cycle — typically the charger will show no response or a fault blink. This happens because the charger checks for a minimum cell voltage before committing to a full charge, and a deeply discharged pack falls outside that window. The fix is a trickle or recovery charge: if your charger has a recovery mode, use it; if not, place the pack on charge, remove it after 10 minutes, and reinsert to prompt the charger to re-check voltage. Confirm the pack has climbed above 8.5V before expecting a normal charge cycle to start.