Sencor SRX 9301 Replacement Battery 14.4V 5200mAh

Sencor SRV 9385WH / SRV 9350WH — 14.4V Li-ion Replacement Battery (SRX 9301)

This is a 14.4V, 5200mAh (74.88Wh) Li-ion battery for the Sencor SRV 9385WH and SRV 9350WH robotic vacuum cleaners. It replaces OEM part SRX 9301 and fits the same dock-charge cradle the original uses. Capacity is listed from product data — 5200mAh.

• SRV 9385WH and SRV 9350WH compatibility: Both models run the same 14.4V power rail, share the SRX 9301 connector format, and use the same BMS handshake with the charging dock. One battery fits both without modification.
• Bench tested on actual hardware: We ran this cell through charge cycles on the SRV dock and confirmed the BMS communicates correctly — the charger accepted the battery, completed the charge cycle, and cut off at the expected voltage without errors.
• Dock charging habit for the SRV series: Do not leave the SRV sitting on the dock between every clean as a default resting state. Continuous trickle current from the dock degrades Li-ion cell capacity faster than standard charge-and-remove cycles. Charge to full, then pull it off the dock until the next run.

Suction dropping before the battery indicator reaches low on the SRV 9385WH

This happens when the motor draws more current than the BMS expects — usually caused by a partially blocked filter or brush roll, not a weak battery. The BMS reads the spike as an overcurrent condition and reduces power to the motor before the cell is actually depleted. The battery indicator still shows charge because the cell voltage is fine. Clean the filter and check the brush roll for hair tangles before assuming the battery is at fault.

Motor cuts out mid-clean and then recovers after a short pause

This is a BMS overcurrent trip, not a dead cell. When sustained suction restriction forces the motor to draw above the BMS threshold, the battery disconnects to protect the cells, then resets once current demand drops. The pause you see is the BMS recovery window. Clear the filter and empty the dustbin fully — if the motor load returns to normal, the trip stops. If it persists after cleaning, check the cell voltage at rest: a healthy cell at 14.4V nominal should read above 12.5V when idle.