Bosch BHN16L 14.4V Cordless Vacuum Replacement Battery 3500mAh

Bosch BHN16L / Move 16V — 14.4V Li-ion Replacement Battery (801BPV144-01)

This 14.4V, 3500mAh Li-ion battery pack replaces the original power cell in the Bosch BHN16L, BHN16L/04, and Move 16V cordless handheld vacuums. It matches the OEM voltage rail and connector configuration the charging dock expects. Capacity figures come from the product data sheet — 3500mAh / 50.4Wh.

• BHN16L and Move 16V platform fit: These models share the same 14.4V battery bay, connector pinout, and BMS handshake protocol. One pack covers all three variants without modification.
• Bench tested on actual hardware: We ran this cell through the BHN16L's charge cycle and monitored BMS communication with the dock. The protection circuit responded correctly to full-charge cutoff and discharge floor events without fault codes.
• Dock charging discipline for the BHN16L: Do not leave the vacuum sitting on the charging dock permanently. The BHN16L dock applies a trickle charge once the pack is full — continuous trickle accelerates cell degradation faster than normal use cycles. Charge to full, then remove the vacuum from the dock.

Suction dropping before the battery indicator reaches low on the BHN16L

The BHN16L motor draws more current when airflow is restricted — a partially blocked filter forces the motor to work harder, pulling voltage down faster than the indicator anticipates. The indicator reads pack voltage at rest, not under motor load, so it lags behind real-world depletion. Under a sustained blockage load, pack voltage can sag below the motor's minimum operating threshold while the indicator still shows mid-charge. Clean or replace the filter first — if suction recovers, the battery is not the cause.

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

This is a BMS overcurrent trip, not a dead battery. When the vacuum's intake is blocked or the filter is heavily loaded, current draw spikes past the protection circuit's threshold and the BMS disconnects the output rail. After a few seconds the BMS resets and power returns. The fix is clearing the blockage or cleaning the filter before the next run. If the cutout happens on an unobstructed, clean filter, check that the pack voltage at rest reads above 12.6V — below that, the cells may no longer hold adequate charge under motor-start surge.