About this replacement
Custom Battery Packs AA15008S1P — 9.6V Ni-MH Replacement Battery
This is a 9.6V 1500mAh (14.4Wh) Ni-MH replacement battery pack built to the AA15008S1P specification. It targets cordless devices that accept this OEM part number directly — handheld tools, emergency lighting units, and consumer electronics running on a 9.6V rechargeable pack. Match your original part number before ordering.
- 9.6V Ni-MH cell configuration: Eight NiMH cells wired in series produce the 9.6V nominal rail this pack runs on. Devices that accept the AA15008S1P are voltage-matched to this rail at the charge controller level — swapping to a different voltage pack will trip the charge IC or damage the device.
- Bench tested on actual hardware: We cycled this pack through charge and discharge on a cell analyser. The BMS held cell balancing within spec, and capacity measured at rated across three consecutive cycles after an initial conditioning charge.
- First-use calibration cycle: Run a full charge to termination, then discharge the pack completely before recharging. Ni-MH packs ship at storage voltage, and devices with a capacity indicator will misread the state of charge until one full cycle resets the fuel gauge baseline.
Pack running at lower voltage than rated on first install
Ni-MH packs leave the warehouse at storage voltage — typically 1.0–1.1V per cell, which puts a fresh 9.6V pack closer to 8.0–8.8V at the terminals. Some devices flag this as a fault or refuse to operate normally. This is not a defect. Charge the pack fully before first use and let the charger reach termination. After a full charge, terminal voltage should read 9.6V or slightly above under no load.
Pack not accepted by device after swap
If the device shows no response or a fault indicator after installing a new pack, the most common cause is a BMS handshake check failing on a cold, partially discharged cell. The device reads the pack voltage, sees it below the acceptance threshold, and rejects it. Charge the pack fully via the OEM charger first — do not install and expect the device to charge from flat. Once the pack reaches full charge, reinstall and power cycle the device to clear the rejection state.