{"product_id":"biolight-m8000-replacement-battery-111v-3400mah-li-ion","title":"Biolight M8000 Patient Monitor Replacement Battery 11.1V 3400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBiolight M8000 \/ M9000 Series — 11.1V Li-ion Replacement Battery (LI1104C)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.1V 3400mAh Li-ion battery replaces part number LI1104C (also listed as 12-100-0006) in Biolight patient monitors including the M8000, M9000, M9000A, and M9500. It powers the monitor's vital signs display — heart rate, SpO2, and blood pressure — when AC mains are unavailable or when the unit needs to move with a patient. Capacity is 3400mAh \/ 37.74Wh, matching the OEM specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM8000 \/ M9000 \/ M9500 platform fit:\u003c\/strong\u003e\n    These monitors share a common battery bay geometry, connector pinout, and BMS handshake protocol across the series. The same voltage rail (11.1V nominal, three-cell configuration) and communication lines run across all listed models, which is why one part number covers the full range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles through the BMS and confirmed the protection circuit trips correctly at low-voltage cutoff. The BMS communication line responded normally — the monitor recognised the battery, completed its internal verification, and reported charge state without fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap self-test protocol:\u003c\/strong\u003e\n    After installing this battery, let the monitor complete its full power-on self-test cycle without interruption. The M8000 series runs a BMS verification routine at startup. Cutting power during this sequence causes a false battery fault flag that will persist 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 M8000 alarms low battery immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe M8000 BMS stores a charge profile calibrated to the OEM cell's internal resistance and voltage curve. A new replacement cell has a slightly different resistance signature until it completes one full charge-discharge cycle. Until that cycle runs, the BMS applies a conservative threshold and can flag low battery even when the cell is at capacity. Run one full charge-discharge cycle before clinical use. After that cycle, the monitor's state-of-charge reading stabilises and the alarm clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMonitor will not power on after battery has been in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If a cell drops below approximately 2.5V per cell (7.5V total across a three-cell pack), the BMS enters deep-discharge protection and blocks output — the monitor sees no voltage and will not boot. Place the battery on charge for a minimum of 30 minutes before attempting to power on the monitor. Most BMS circuits recover and re-enable output once the cell voltage climbs back above the recovery threshold, typically around 8.0–9.0V for this pack configuration.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381446148186,"sku":"BWCS-BLM900MX-1","price":119.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381446180954,"sku":"BWCS-BLM900MX-2","price":138.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381446213722,"sku":"BWCS-BLM900MX-3","price":152.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BLM900MX-1.webp?v=1778900875","url":"https:\/\/batteryweb.com\/products\/biolight-m8000-replacement-battery-111v-3400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}