{"product_id":"mindray-vs800-replacement-battery-111v-4400mah-li-ion","title":"Mindray VS800 Patient Monitor Replacement Battery 11.1V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMindray VS800 \/ WATO EX-20 Series — 11.1V Li-ion Replacement Battery (LI23S001A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh Li-ion battery for the Mindray VS800 patient monitor and compatible WATO EX series devices. It fits the VS800 and VS-800 vital signs monitors used in clinical wards, ICUs, and patient transport. Voltage and capacity match OEM part LI23S001A and alternate reference 022-000382-00.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVS800 and WATO EX-20 shared platform:\u003c\/strong\u003e\n    These models run the same 11.1V three-cell Li-ion architecture with an identical battery bay connector and BMS handshake protocol. A single battery covers both platforms without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the VS800's startup self-test sequence and confirmed BMS communication, charge acceptance, and runtime flag behaviour. The cell accepted a full charge and cleared the low-battery flag after one complete charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap startup protocol:\u003c\/strong\u003e\n    After installing this battery, allow the VS800 to complete its full power-on self-test without interruption. The device runs a BMS verification step at boot — cutting power during this window triggers 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\"\u003eVS800 low-battery alarm immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe VS800 BMS stores OEM chemistry calibration data and compares incoming cell readings against that baseline on first use. A fresh replacement cell has no charge history logged, so the BMS flags it as below threshold until one full charge-discharge cycle completes. This is a calibration state, not a cell fault. Run one full cycle — charge to 100%, allow the device to draw the battery down during normal use, then recharge fully — and the alarm clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVS800 will not power on after battery was stored before installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If voltage drops below approximately 9V at the pack level, the VS800 BMS enters a protection state and blocks startup entirely. Connect the device to mains power first — do not attempt to boot on battery alone. Leave it on charge for a minimum of 30 minutes before pressing the power button. The charge IC applies a low-current pre-charge phase to recover the cell before resuming normal charge current.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381498249306,"sku":"BWCS-MVS800MD-1","price":90.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381498282074,"sku":"BWCS-MVS800MD-2","price":106.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381498314842,"sku":"BWCS-MVS800MD-3","price":117.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MVS800MD-1.webp?v=1778901266","url":"https:\/\/batteryweb.com\/products\/mindray-vs800-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}