Bosch BBZ36AB01 7.2V Ni-MH Cordless Vacuum Replacement Battery

Bosch BBZ36AB01 / BBZ37GB01 Series — 7.2V Ni-MH Replacement Battery (00264798)

This is a 7.2V, 3000mAh Ni-MH battery for the Bosch BBZ36AB01 and BBZ37GB01 cordless handheld vacuums, along with the BSB130001 and BSC1201GB01 and related models. It replaces OEM parts 00264798 and 00649059. Capacity is 21.6Wh — sourced directly from the product specification, not estimated.

• BBZ36AB01 and BBZ37GB01 platform fit: These models share a common 7.2V cell configuration, connector pinout, and BMS handshake protocol. Swapping a matched-voltage Ni-MH cell keeps the charger's termination logic working correctly — a mismatched chemistry here will cause the charger to either refuse to cycle or never reach full cutoff.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a BBZ36AB01 platform. The BMS accepted the cell without fault codes, charge termination triggered at the correct delta-V drop, and motor draw remained stable across full discharge.
• Dock charging habit on these vacuums: Do not leave this vacuum sitting on the dock continuously between uses. Ni-MH cells in compact vacuums like these are particularly vulnerable to trickle-charge degradation. Charge to full, remove from the dock, and store the vacuum off-charger until the next use.

Suction dropping before the battery indicator reaches low

On the BBZ36AB01, suction loss often happens while the battery indicator still shows charge remaining. The motor in this vacuum pulls higher current when airflow is restricted — a partially blocked filter forces the motor to work harder, which collapses cell voltage early under load. The BMS reads this sag as a low-battery condition and throttles motor output to protect the cell. Clean or replace the filter first; if suction recovers immediately, the battery was not the problem.

Motor cutting out and then recovering after a few seconds

If the motor on this vacuum stops mid-use and then restarts after a short pause, that is a BMS overcurrent trip, not a dying battery. Sustained restricted airflow — from a clogged filter or blocked nozzle — pushes current draw beyond the BMS protection threshold, which cuts motor power temporarily. The BMS resets itself once current demand drops. Clear the blockage, then restart the vacuum; if the cutout stops occurring, the cell is functioning correctly and the fault was airflow restriction.