Black&Decker DV9605 Replacement Battery 9.6V 3000mAh Ni-MH

Black&Decker DV9605 — 9.6V Ni-MH 3000mAh Replacement Battery

This is a 9.6V Ni-MH battery rated at 3000mAh (28.8Wh), built as a direct replacement for the Black&Decker DV9605 cordless handheld vacuum. It slots into the DV9605 battery compartment and connects to the same charging circuit as the original cell pack. If your original battery no longer powers the motor through a full cleaning session, this is the correct replacement cell.

• DV9605 motor voltage rail: The DV9605 runs its suction motor on a 9.6V Ni-MH cell stack. Dropping below that nominal voltage under motor load causes the suction to fall off noticeably before the battery indicator signals low — a symptom of cell degradation, not a blocked filter.
• Bench tested on actual hardware: We cycled this pack through repeated charge and discharge sequences on the DV9605 platform. The BMS held current delivery stable during sustained motor draw, and cell voltage under load stayed within the expected Ni-MH discharge curve without early cutoff.
• Dock charging on the DV9605: Do not leave the DV9605 sitting on its charging dock permanently. Ni-MH cells in cordless vacuums develop capacity fade significantly faster under continuous trickle charge than cells charged only when the pack is depleted. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low

The DV9605 motor draws higher current when the filter is partially blocked — more resistance means the motor works harder and pulls voltage down faster. A degraded Ni-MH pack cannot sustain the voltage under that extra draw, so suction falls off early even though the battery gauge still reads mid-range. Before blaming the battery, clean or replace the filter and retest. If suction holds longer after that, the pack was fine and the filter was the cause. If suction still drops early with a clean filter, the cell pack has aged past its usable capacity and needs replacement.

Motor cuts out mid-use then recovers after a few seconds

This is a BMS overcurrent trip, not a dead battery. When the filter is restricted or a blockage partially stalls the motor, current draw spikes above the BMS threshold and the circuit opens to protect the cells. The pack recovers after a brief cooldown and the vacuum restarts. Clear the blockage, clean the filter, and run again — if the cut-out stops, the BMS was doing its job correctly. If cut-outs continue on a clear filter and the pack voltage reads below 9.0V at rest, the cell pack is the fault.