Pool Blaster Swimming Pool 8.4V Replacement Battery 10142A007

Pool Blaster Swimming Pool / Max — 8.4V Ni-MH Replacement Battery (10142A007)

This 8.4V 3000mAh Ni-MH battery fits the Pool Blaster Swimming Pool and Max cordless pool vacuums. It replaces OEM part numbers 10142A007, PBA007, 7C2219MF, and PB-BH843-RR1P. The battery restores cordless operation for cleaning pool floors and walls when original cells have degraded.

• Swimming Pool and Max compatibility: Both models run the same 8.4V Ni-MH cell pack with an identical connector and BMS handshake. A single replacement cell covers either unit without modification.
• Bench tested on actual hardware: We cycled this cell through multiple charge and discharge runs on the Pool Blaster platform. The BMS accepted the pack cleanly, with no overcurrent trips or charge rejection at full motor draw.
• Dock charging habit for Ni-MH cells: Ni-MH chemistry is particularly sensitive to continuous trickle charge. Charge the Pool Blaster fully and remove it from the dock — leaving it connected between uses accelerates capacity fade in Ni-MH cells faster than in lithium-based packs.

Why the Pool Blaster loses suction before the battery indicator hits low

Ni-MH cells have a flatter discharge curve than lithium, so the indicator can still read mid-level while the actual cell voltage has already sagged under load. When the motor draws hard against a clogged filter or tight debris, internal resistance in degraded cells causes voltage to drop faster than the indicator reflects. The BMS reads pack voltage, not filtered suction output — so the vacuum weakens before any low-battery signal triggers. Clearing the filter and checking that the impeller chamber is free of debris is the first step; if suction still drops early, the cell pack itself has likely faded below usable capacity.

Pool Blaster motor cuts out mid-clean, then restarts after a few seconds

This is a BMS overcurrent trip, not a motor fault. When suction is restricted — by a blocked filter, a stuck leaf, or the head pressed flat against a wall — the motor pulls more current than the BMS allows and the pack shuts off to protect the cells. After a few seconds the BMS resets and the motor restarts. Check and rinse the filter before the next session, and avoid holding the vacuum stationary against a flat surface for more than a moment. If trips continue with a clean filter, measure pack voltage under load: a healthy 8.4V Ni-MH pack should hold above 7.2V during normal motor draw.