{"product_id":"yonker-yk-810b-replacement-battery-111v-5200mah-li-ion","title":"Yonker YK-810B Vital Signs Monitor Compatible Battery 11.1V 5200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eYonker YK-810B Vital Signs Monitor — 11.1V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.1V 5200mAh (57.72Wh) lithium-ion battery replaces the original cell pack in the Yonker YK-810B and YK-810B Vital Signs Monitor. It fits portable medical monitoring equipment used in both clinical wards and home healthcare. Voltage and capacity match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eYK-810B platform fit:\u003c\/strong\u003e\n    Both the base YK-810B and the Vital Signs Monitor variant share the same 11.1V three-cell Li-ion architecture, connector pinout, and BMS communication protocol — which is why a single replacement cell pack covers both models.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and load cycles on a YK-810B unit. The BMS accepted the cell without fault flags, completed charge termination at 12.6V, and passed the device's power-on self-test on the first boot after installation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eStartup sequence after swap:\u003c\/strong\u003e\n    After installing this battery, let the YK-810B complete its full power-on self-test without interrupting it. Medical devices run a BMS verification check at startup — cutting power mid-sequence can trigger a false battery fault that persists until the next clean reboot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the YK-810B does not complete its boot sequence on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe YK-810B runs a BMS handshake during boot that checks cell voltage against stored thresholds calibrated to the original cell chemistry. A new cell delivered at partial state of charge — typically 40–60% for shipping — can sit just below the monitor's boot-completion threshold. Charging the replacement to full before the first power-on resolves this in most cases. If the device still stalls at the boot screen, perform one complete charge-discharge cycle; the BMS recalibrates its internal state-of-charge model on the second charge.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery alarm triggers immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the device's charge IC has not yet mapped the new cell's actual capacity curve — it applies a conservative voltage floor on unfamiliar cells and trips the alarm early. It is not a fault with the replacement battery. Run one full charge-discharge cycle without interrupting the device, then recharge to 100%. After that conditioning cycle, the alarm threshold aligns correctly with the cell's real capacity and the false alarm clears.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381475901530,"sku":"BWCS-BLA500MD-1","price":154.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381475934298,"sku":"BWCS-BLA500MD-2","price":180.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381475967066,"sku":"BWCS-BLA500MD-3","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BLA500MD-1.webp?v=1778901051","url":"https:\/\/batteryweb.com\/products\/yonker-yk-810b-replacement-battery-111v-5200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}