Bosch 828BPV252-01 Cordless Vacuum Replacement Battery 25.2V 3400mAh

Bosch BBH3PETGB/01 Series — 25.2V Li-ion Replacement Battery (828BPV252-01)

This is a 25.2V, 3400mAh (85.68Wh) lithium-ion battery for the Bosch BBH3 series cordless stick vacuum. It fits the BBH3PETGB/01, BBH3PETGB/03, BBH3ZOO25/01, BBH3ZOO25/03, and over 24 additional BBH3 variants. When the original cell degrades and suction drops off early, this cell restores full motor voltage from the first charge cycle.

• BBH3 series platform fit: The BBH3 line shares a common 25.2V battery rail and connector across pet, zoo, and standard variants. The BMS in this cell communicates with the vacuum's charge and discharge circuitry using the same handshake as the OEM unit — the vacuum recognises the cell and reports charge state correctly.
• Bench tested on actual hardware: We ran this cell through sustained motor load on a BBH3 unit with a partially restricted filter to simulate real-use draw. The BMS held voltage without nuisance tripping and resumed correctly after a deliberate overcurrent event triggered a brief cutout.
• Dock charging behaviour on the BBH3: The BBH3 charging dock does not cut power when the cell reaches full charge — it continues to trickle. Remove the vacuum from the dock once the indicator shows full. Leaving it docked continuously accelerates capacity fade in Li-ion cells faster than regular charge-discharge cycling does.

Suction dropping before the battery indicator reaches low

This is the most misread failure on the BBH3. The motor pulls more current when airflow is restricted by a dirty filter, which causes voltage to sag under load even when the cell still holds a surface charge. The battery indicator reads remaining capacity at rest, not under load — so it can show half-full while the motor is already starved. Clean or replace the filter first, then retest suction under load. If suction recovers, the battery is not the fault.

Motor cuts out mid-use then comes back after a few seconds

This is a BMS overcurrent trip, not a dead cell. When the motor sustains a high-draw state — typically from a blocked brush roll or clogged post-motor filter — current draw spikes past the BMS protection threshold and the cell shuts output temporarily. The cell recovers once the trip resets, usually within two to five seconds. Clear the blockage or filter restriction, then retest. If the cutout persists on a clean machine, check that the cell resting voltage is above 22V before charging.