About this replacement
Black&Decker GS700 — 4.8V Ni-MH Replacement Battery (489727-00)
This is a 4.8V, 2200mAh Ni-MH replacement battery for the Black&Decker GS700 cordless handheld vacuum. It replaces OEM part number 489727-00. When the original cell can no longer hold a full charge, this unit restores the vacuum's ability to run through a full cleaning cycle.
- GS700 compatibility: The GS700 runs a 4.8V Ni-MH cell pack with a specific connector and charge termination profile. This replacement matches that voltage rail and connector orientation so the vacuum's charge circuit recognises the pack correctly.
- Bench tested on actual hardware: We cycled this pack through charge and discharge on the GS700 platform. The BMS accepted the cell, charge termination triggered at full capacity, and the motor drew consistent current across multiple test runs without cutoff.
- Dock charging habit matters on this vacuum: Do not leave the GS700 sitting on the charging dock continuously. Ni-MH cells in handheld vacuums develop capacity fade significantly faster under trickle charge than cells charged only when depleted. Charge fully, then remove from the dock.
Suction dropping before the battery indicator reaches low
This happens when the motor draws more current than the cell can sustain under load — voltage sags before the pack is actually depleted. A blocked filter makes this worse by forcing the motor to work harder against restricted airflow, spiking current draw. The result is noticeably weaker suction even though the indicator still shows charge remaining. Clean or replace the filter first, then test suction at full charge.
Motor cuts out mid-use then recovers after a short pause
This is an overcurrent trip, not a dead battery. When suction is restricted — by a clogged filter or a blockage in the nozzle — the motor pulls sustained high current and the BMS cuts power to protect the cell. The pack recovers once current demand drops, which is why the vacuum restarts after a pause. Clear the blockage, check the filter, and confirm the pack voltage reads above 4.5V at rest before ruling out a weak cell.