{"product_id":"dreame-h12-replacement-battery-216v-3700mah-li-ion","title":"Dreame H12 Cordless Vacuum Replacement Battery 21.6V 3700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDreame H12 \/ H12 Pro Series — 21.6V Li-ion Replacement Battery (W2210)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 21.6V, 3700mAh lithium-ion battery for the Dreame H12, H12 Pro, and H12 Pro Plus cordless vacuum cleaners. It fits the OEM part number W2210 and W2210-6S1P-BWB battery positions. When the original cell loses capacity and suction drops off well before the indicator hits low, this is the direct replacement.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eH12 and H13 Pro platform compatibility:\u003c\/strong\u003e\n    These models share the same 21.6V six-cell architecture and identical battery housing connector. The BMS handshake protocol across this range is consistent, so one replacement cell covers the full listed model group without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge cycles on the H12 platform and confirmed the BMS communicates correctly with the vacuum's motor controller — charge acceptance, discharge cutoff, and cell balancing all behaved within the OEM specification range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eDock charging habit on the H12:\u003c\/strong\u003e\n    Do not leave the H12 sitting on the charging dock after it reaches full charge. Continuous dock contact applies a low-level trickle that accelerates capacity fade in lithium cells. Charge to full, then remove the vacuum 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 on the H12\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the motor draws more current than the BMS expects — usually caused by a partially blocked filter, not a failing battery. A restricted filter forces the motor to work harder, pulling sustained high current that triggers a voltage sag well above the BMS's low-cell cutoff threshold. The BMS reads the sag as a near-depleted pack and throttles power to protect the cells. Clean or replace the filter first, then retest — if suction holds steady through a full clean floor cycle, the battery is not the root cause.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMotor cuts out mid-clean then recovers after a few seconds\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a BMS overcurrent trip, not a dead battery. When suction is sustained against a blockage or a heavily loaded carpet, current draw spikes past the BMS's overcurrent threshold and the pack disconnects to protect the cells. The BMS resets automatically once current demand drops — which is why the vacuum restarts after a brief pause. Clear any blockage, check that the filter airflow is unrestricted, and confirm the voltage reads at or above 21.6V on a full charge before suspecting a cell fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426484748378,"sku":"BWCS-DRH121VX-1","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426484781146,"sku":"BWCS-DRH121VX-2","price":116.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426484813914,"sku":"BWCS-DRH121VX-3","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DRH121VX-1.webp?v=1779933419","url":"https:\/\/batteryweb.com\/products\/dreame-h12-replacement-battery-216v-3700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}