About this replacement
Ecovacs Winbot W710 / WRN70 Series — 11.1V Li-ion Replacement Battery (10000254)
This is an 11.1V, 650mAh Li-ion replacement battery (OEM part 10000254) for the Ecovacs Winbot W710, WRN70, W730, and WRN60 robotic window cleaners. These devices cling to vertical glass and clean autonomously — a degraded battery causes the unit to stall mid-pane or fail to complete a full window pass. Swapping to a fresh cell restores cordless operation on the original hardware.
- W710 / WRN70 / W730 / WRN60 platform fit: These models share the same 11.1V three-cell Li-ion pack format and BMS handshake protocol. The suction motor, squeegee drive, and safety hold-down vacuum all pull from the same rail — one degraded cell triggers an imbalance the BMS reads as a fault, cutting the unit off glass prematurely.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on the W710 platform. The BMS accepted the pack without fault codes, hold-down suction engaged correctly at startup, and voltage held stable across the motor and drive circuits throughout the test cycle.
- Post-cleaning storage tip: The Winbot uses its battery to maintain hold-down suction during active cleaning — but once docked, the vacuum seal is off and the pack sits idle. Do not leave it on the dock indefinitely. Charge fully after each use, then disconnect. Continuous trickle charge on a resting pack accelerates cell degradation noticeably faster than charge-then-remove habits.
Why the Winbot drops off glass before the battery indicator turns red
The hold-down suction motor and the drive motor both draw from the 11.1V pack simultaneously. As cells age, internal resistance rises — voltage sags under the combined load even when the indicator still reads mid-range. The BMS interprets that sag as a protection threshold breach and cuts power to the hold-down motor first, releasing the unit from the glass. A fresh cell at full rated capacity eliminates the sag because internal resistance returns to spec.
Replacement battery not charging on the dock after fitting
The Winbot dock checks for a valid BMS response before allowing charge current to flow — if the pack is deeply discharged from storage, the BMS may not respond and the dock will show no activity. Connect the Winbot to the dock and leave it for 15–20 minutes without disturbing it; some BMS units need a trickle pre-charge to wake before full charge begins. If the dock light remains completely dark after that period, check that the battery connector is fully seated — the pack is small and the connector can sit slightly proud. A properly seated, woken pack should register between 9.8V and 11.1V at the terminals before a full charge cycle completes.