{"product_id":"kyvol-cybovac-s31-replacement-battery-144v-5200mah-li-ion","title":"Kyvol Cybovac S31 Replacement Battery 14.4V 5200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKyvol Cybovac S31 — 14.4V Li-ion 5200mAh Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 14.4V Li-ion battery replaces the original power cell in the Kyvol Cybovac S31 robotic vacuum cleaner. Rated at 5200mAh (74.88Wh), it restores the cleaning cycles the vacuum needs to cover a full floor plan and return to dock. Fits both listed Cybovac S31 variants.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCybovac S31 compatibility:\u003c\/strong\u003e\n    Both S31 variants run the same 14.4V battery bay, connector pinout, and BMS communication protocol — one cell covers the full model range listed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full discharge cycles on the S31 platform. The BMS handshake completed without error codes, and the charger accepted the cell without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eDock charging habit for the S31:\u003c\/strong\u003e\n    The S31 is designed to sit on its dock between cleans, but leaving it docked continuously accelerates capacity fade. Charge to full, then remove the vacuum from the dock if it won't run again for several days.\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 S31\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe S31 motor draws significantly more current when the filter is partially blocked or the brush roll is restricted. At elevated draw, cell voltage sags below the motor controller's threshold before the fuel gauge registers low — so the vacuum loses suction power while the indicator still reads mid-charge. This is a voltage-sag issue, not a capacity issue. Clean the filter and check the brush roll before concluding 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 pause\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis pattern is a BMS overcurrent trip — sustained high current draw from a blocked suction path or clogged filter pushes the cell beyond its discharge rate limit, and the BMS shuts output off to protect the cell. After a short pause the BMS resets and the motor restarts. The fix is not the battery. Remove and wash the filter, clear any debris from the inlet, then retest. If the cutout persists with a clean filter, check that cell voltage under load stays above 12V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43427996729434,"sku":"BWCS-PCM710VX-1","price":70.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43427996762202,"sku":"BWCS-PCM710VX-2","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43427996794970,"sku":"BWCS-PCM710VX-3","price":92.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PCM710VX-1.webp?v=1779933755","url":"https:\/\/batteryweb.com\/products\/kyvol-cybovac-s31-replacement-battery-144v-5200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}