{"product_id":"xiaomi-1c-replacement-battery-252v-2500mah-li-ion","title":"Xiaomi Mi 1C Cordless Vacuum Replacement Battery 25.2V 2500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eXiaomi 1C \/ Dreame V8 V9 Series — 25.2V Li-ion Replacement Battery (WN4)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 25.2V 2500mAh Li-ion battery pack for the Xiaomi Mi Vacuum Cleaner 1C and Dreame V8, V9, and V9B cordless stick vacuums. It slots into the same bay as the original WN4 pack and communicates with the same BMS circuitry. Use the capacity figure from this listing — 2500mAh — not figures quoted elsewhere.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1C and Dreame V-series compatibility:\u003c\/strong\u003e\n    These models share the same 25.2V battery bay, WN4 connector pinout, and BMS handshake protocol. Swapping between them does not require any firmware change or adapter.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through full charge and discharge cycles on the 1C platform. The BMS held steady under motor-start inrush and did not trip on sustained high-speed suction mode.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eDock charging habit on stick vacuums:\u003c\/strong\u003e\n    Do not leave this vacuum on the charging dock permanently. Continuous trickle charging accelerates capacity fade on Li-ion packs faster than normal cycle ageing. Charge to full, then remove it from the dock.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSuction dropping before the battery indicator reaches low\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 1C motor draws significantly more current when the filter is partially blocked — sometimes two to three times normal draw. The BMS reads this as a voltage sag and throttles output to protect the cells, even when the indicator still shows adequate charge. The vacuum appears to lose suction, but the battery is not the root cause. Clean or replace the filter first, then retest before assuming the battery is at fault.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMotor cutting out mid-clean and then recovering after a few seconds\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a BMS overcurrent trip, not a dead battery. When sustained suction resistance — from a clogged filter or blockage — pushes draw above the BMS threshold, the pack cuts power and waits for current to drop before reconnecting. The cut-out and recovery cycle will keep repeating until the restriction is cleared. Check the filter, brush roll, and inlet for blockages, then confirm the pack reads at least 24V on a multimeter before assuming it needs replacing.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43427992928346,"sku":"BWCS-XMV900VX-1","price":122.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43427992961114,"sku":"BWCS-XMV900VX-2","price":144.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43427992993882,"sku":"BWCS-XMV900VX-3","price":160.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-XMV900VX-1.webp?v=1779933756","url":"https:\/\/batteryweb.com\/products\/xiaomi-1c-replacement-battery-252v-2500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}