Proscenic VR1717 Cocoa Smart 790T Replacement Battery 14.8V

Proscenic Cocoa Smart 790T — 14.8V Li-ion Replacement Battery (VR1717)

This 14.8V 3400mAh (50.32Wh) Li-ion battery replaces part number VR1717 in the Proscenic Cocoa Smart 790T and 780T robotic vacuum cleaners, as well as the Summer P3 and Summer P2s models. It powers the vacuum's drive motors, suction fan, and onboard navigation system. Capacity figures come from the product specification — 3400mAh at 14.8V nominal.

• Multi-model fit — 790T, 780T, Summer P3, Summer P2s: These models share the same 14.8V battery platform, connector pinout, and BMS handshake protocol. Swapping a battery across any of them does not require reconfiguration — the replacement cell presents the same communication profile the charger expects.
• Bench tested on actual hardware: We cycled this battery through charge and discharge on the 790T platform. The BMS held voltage within spec under sustained motor load and cut off cleanly at the low-cell threshold rather than allowing an unbalanced deep discharge across the four-cell series string.
• Dock charging habit for the 790T: Do not leave the vacuum sitting on the charging dock permanently between cleaning cycles. Continuous trickle charging through the dock degrades cell capacity measurably faster than charging only when depleted, then removing the vacuum from the dock once full.

Suction dropping before the battery indicator reaches low

The 790T's suction fan motor draws significantly more current when the filter is partially blocked or the brush roll is restricted. That elevated draw pulls the cell voltage down under load faster than the battery indicator — which reads resting voltage — can reflect. The indicator still shows mid-charge while the motor is already operating in a voltage sag. Clean the filter and clear the brush roll first; if suction recovers, the battery is not the cause.

Motor cuts out mid-clean then restarts after a short pause

This is a BMS overcurrent trip, not a dead battery. When sustained restricted airflow forces the motor to pull above the BMS current limit — typically triggered by a clogged filter or debris jam at the intake — the protection circuit opens and the vacuum shuts down. The BMS resets automatically after the cell temperature drops, which is why the vacuum restarts a minute or two later. Clear the blockage and verify filter condition before replacing the battery; the trip will repeat on a new cell under the same conditions.