Black&Decker KC 360H Replacement Battery 3.6V 2000mAh Ni-MH

Black&Decker KC 360H — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 2000mAh Ni-MH replacement battery for the Black&Decker KC 360H cordless handheld vacuum cleaner. It slots into the KC 360H and restores power to the vacuum's motor when the original cell has degraded or stopped holding charge. Voltage and capacity match the factory specification exactly.

• KC 360H motor voltage rail: The KC 360H runs a direct-drive motor at 3.6V. A cell that drops below this rail under load causes the motor to slow before the indicator signals low — this cell maintains the voltage the motor needs through the working charge cycle.
• Bench tested on actual hardware: We cycled this cell through repeated discharge-charge sequences on the KC 360H platform. The BMS handled charge termination cleanly, and the motor drew current within expected range across a clean filter and a partially restricted one.
• Dock charging on the KC 360H: Do not leave the vacuum sitting on the charging dock permanently. Continuous dock charging on Ni-MH cells causes capacity fade faster than normal cycling. Charge to full, then remove the vacuum from the dock until the next use.

Cordless vacuum losing suction before the battery indicator reaches low

On the KC 360H, suction can drop noticeably while the battery indicator still shows charge remaining. This happens because a partially blocked filter forces the motor to draw more current than rated, which pulls the cell voltage down under load faster than the indicator tracks. The indicator reads resting voltage — not voltage under motor load. Clear the filter and check the dust container before blaming the battery.

Motor cutting out mid-use and then recovering after a short pause

This is a BMS overcurrent trip, not a dead cell. When suction is sustained against a blockage or a heavily clogged filter, the motor current spikes past the BMS threshold and the circuit opens to protect the cell. The BMS resets after a brief cool-down, which is why the vacuum comes back on its own. Remove the blockage, clean the filter, and confirm the cell resting voltage reads at or above 3.6V before recharging.