{"product_id":"ecovacs-winbot-mini-replacement-battery-37v-3400mah-li-ion","title":"Ecovacs Winbot Mini Replacement Battery 3.7V 3400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEcovacs Winbot Mini \/ W1S \/ W2 Pro — 3.7V Li-ion Replacement Battery (201-2432-0438)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 3400mAh Li-ion cell replaces the factory battery in the Ecovacs Winbot Mini, Winbot W1S, and Winbot W2 Pro window cleaning robots. It also cross-references OEM part S32-LI-36-3000. The battery powers the suction motor and drive system that keeps the unit adhered to and moving across glass surfaces.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWinbot Mini, W1S, and W2 Pro compatibility:\u003c\/strong\u003e\n    All three models share the same 3.7V single-cell architecture, connector pinout, and BMS communication protocol — which is why one cell covers the full range. Swapping between these models does not require firmware changes or adapter cables.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through repeated suction-motor start loads and confirmed the BMS handled inrush current without tripping. Discharge curves stayed within spec across multiple cycles, and the protection circuit responded correctly to simulated over-discharge conditions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eWinbot storage between cleaning sessions:\u003c\/strong\u003e\n    If the robot sits unused for more than two weeks, discharge it to around 50% before storing. Leaving it fully charged for extended periods accelerates lithium plating and causes irreversible capacity loss faster than regular use would.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Winbot cuts out mid-clean and re-attaches to the glass\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Winbot's suction pad must maintain constant negative pressure to stay on the glass. When the battery voltage sags under combined drive-motor and suction-motor load, the BMS can briefly cut output to protect the cell. The robot loses suction, triggers its safety tether, and halts. This is more common toward the end of a battery's service life, when internal resistance has risen enough that high-draw moments cause a sharper voltage drop than the BMS tolerates.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReplacement battery shows full charge instantly but drains within minutes of use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis usually means the charger completed a voltage-based cutoff without fully conditioning the new cell — common when a deeply discharged OEM battery was swapped without a full charge cycle first. The new cell's BMS may also need a complete charge-discharge cycle before its state-of-charge reporting calibrates correctly. Run one full charge from flat to 100% before judging actual capacity. Confirm the charger output reaches 4.2V at the charging contacts before assuming a fault with the cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426379858010,"sku":"BWCS-EDW210VH-1","price":48.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426379890778,"sku":"BWCS-EDW210VH-2","price":57.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426379923546,"sku":"BWCS-EDW210VH-3","price":63.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EDW210VH_1.webp?v=1779931070","url":"https:\/\/batteryweb.com\/products\/ecovacs-winbot-mini-replacement-battery-37v-3400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}