Hoover B015 14.8V Cordless Vacuum Replacement Battery 2600mAh

Hoover HGO31 Series — 14.8V Li-ion Replacement Battery (B015)

This 14.8V, 2600mAh (38.48Wh) Li-ion battery replaces the original B015 / 35602251 / HGO0314BAT pack used in Hoover cordless stick and handheld vacuums. It fits the HGO31, HGO32, HGO33, and HGO310011 series. Voltage and cell count match the original — the motor controller sees no difference.

• HGO31–HGO33 platform compatibility: These models share the same 14.8V four-cell Li-ion architecture, the same connector footprint, and the same BMS communication protocol — which is why one pack covers the full range.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on an HGO31 unit. The BMS handshook with the charger correctly on first connection, and cell balance stayed within 30mV across all four cells at full charge.
• Dock charging habit on HGO31 models: Do not leave this vacuum sitting on the dock permanently between uses. Continuous trickle current after full charge accelerates capacity fade in Li-ion packs at this voltage. Charge to full and remove from the dock.

Suction dropping before the battery indicator reaches low on the HGO31

A partially blocked filter forces the motor to draw more current than rated to maintain airflow. That extra draw causes the pack voltage to sag under load — the indicator still shows charge, but the motor is already starved. The BMS reads this as a healthy cell state but the voltage under load can drop below the motor controller's minimum. Clean or replace the filter first — if suction restores fully, the battery was never the issue.

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

This is a BMS overcurrent trip, not a cell failure. Sustained restricted airflow — from a blocked filter or a tangled brush roll — pushes draw past the pack's overcurrent threshold, and the BMS disconnects the output to protect the cells. The pack resets automatically once current drops. Clear the restriction, then confirm the charger reads the pack correctly — a healthy post-reset charge should bring cells back to 16.8V at full.