Hoover Rogue 970 Robot Vacuum Replacement Battery 14.4V 3400mAh

Hoover Rogue 970 Robot Vacuum — 14.4V Li-ion Replacement Battery (440011973)

This 14.4V, 3400mAh Li-ion battery replaces part number 440011973 in the Hoover Rogue 970 series robot vacuum. It fits the BH70970, Rogue 970 Wi-Fi Connected, and Rogue 970 Wi-Fi Connected Robotic Vacuum. Voltage, cell count, and connector match the original Hoover specification exactly.

• Rogue 970 series compatibility: All variants in the BH70970 line share the same 14.4V battery bay, connector pinout, and BMS handshake protocol. Swapping between Wi-Fi and non-Wi-Fi models is not an issue — the battery circuit is identical across the range.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the Rogue 970 platform. The BMS communicated correctly with the dock charger, accepted charge without error flags, and held voltage within spec across sustained suction load on both hard floor and carpet modes.
• Dock charging habit on robot vacuums: The Rogue 970 is designed to return to its dock autonomously, which means it can end up on continuous charge for days. Li-ion cells kept at full charge under trickle current degrade faster than those cycled normally. Charge to full, then remove the dock's power until the next scheduled clean.

Suction dropping before the battery indicator reaches low

The Rogue 970's motor draws significantly more current when the filter is partially blocked — sometimes two to three times the rated draw. A degraded battery cannot sustain voltage under that elevated load, so the BMS begins throttling power output well before the indicator registers a low charge. The vacuum appears to lose suction, but the battery gauge still shows green. Cleaning or replacing the filter removes the excess load and is the first step before assuming the battery is the problem.

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

This is a BMS overcurrent trip, not a battery fault. When the Rogue 970 hits a carpet edge, transitions surfaces, or encounters debris that partially blocks the brush roll, instantaneous current spikes past the BMS protection threshold and the circuit opens. The BMS resets once the draw drops, which is why the vacuum restarts on its own. Clear any brush roll obstruction and check that the filter is clean. If trips continue on a new battery with a clean filter, inspect the brush roll bearing — a worn bearing creates sustained high draw that triggers the same response.