About this replacement
Bosch BBH22041/01 Series — 20.4V Ni-MH Replacement Battery (11015613)
This is a 20.4V 1800mAh Ni-MH replacement battery for the Bosch BBH22041/01 cordless vacuum cleaner and related models including the BBH2RB20GB/01 and VXAS011V20. It replaces OEM part number 11015613. Capacity is 1800mAh (36.72Wh), matching the original specification.
- BBH22041/01, BBH2RB20GB/01, VXAS011V20 compatibility: These three models share the same 20.4V cell configuration, physical connector, and BMS communication protocol — the battery pack slots in and the charger recognises it without modification.
- Bench tested on actual hardware: We cycled this pack through full charge and discharge on the BBH22041/01 platform. The BMS held voltage above the motor cut-off threshold through the full discharge curve, and the charger completed the charge cycle without fault codes.
- Dock charging behaviour on this vacuum: Do not leave the vacuum sitting on the charging dock continuously. Ni-MH cells in this pack degrade significantly faster under constant trickle charge than they do under regular charge-then-remove cycles. Charge to full and pull it off the dock.
Suction dropping before the battery indicator reaches low
This happens when motor load increases — usually from a partially blocked filter or a restricted brush roll — and the battery voltage sags under that higher draw. Ni-MH cells drop voltage faster under sustained high current than the indicator circuit tracks. The vacuum motor slows before the LED signals low battery because the indicator reads resting voltage, not loaded voltage. Clean the filter first; if suction recovers, the battery is not the cause.
Motor cutting out mid-use then recovering after a few seconds
This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked filter, sealed floor nozzle, or heavy carpet — the motor draws more current than the BMS threshold allows, and the pack shuts off to protect the cells. The BMS resets once current demand drops, which is why the vacuum comes back on after a brief pause. Clear the blockage and confirm the filter is clean; if the cutout continues after that, check that pack voltage at rest reads at least 20.0V before use.