{"product_id":"marquette-eagle-4000-replacement-battery-12v-2800mah-ni-mh","title":"Marquette Eagle 4000 Patient Monitor Replacement Battery 12V 2800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMarquette Eagle 4000 Patient Monitor — 12V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V 2800mAh Ni-MH replacement battery for the Marquette Eagle 4000 portable patient monitor. It powers the device during patient transport and periods away from AC power. Voltage and capacity match the original cell specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEagle 4000 compatibility:\u003c\/strong\u003e\n    The Eagle 4000 draws from a single 12V battery rail during transport. The BMS on this monitor checks voltage and chemistry recognition at startup — a cell outside specification will trigger an immediate fault. This replacement matches the voltage rail and Ni-MH chemistry the BMS expects.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran a full charge-discharge cycle on the Eagle 4000 platform and confirmed the BMS completed its self-test sequence without fault. Charge acceptance was normal, and the monitor reached operational readiness as expected across multiple cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation power-on sequence:\u003c\/strong\u003e\n    After fitting this battery, allow the Eagle 4000 to complete its full power-on self-test without interruption. The device runs a BMS verification step at startup — cutting power during this sequence triggers a false battery fault that persists until the next clean reboot cycle.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Eagle 4000 alarms low battery immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Eagle 4000 BMS compares internal cell data against thresholds calibrated for a broken-in cell. A new Ni-MH cell has not yet reached its stable internal resistance baseline, so the BMS reads its discharge curve as below threshold even when the cell is fully charged. This is not a fault in the battery. One complete charge-discharge cycle is usually enough for the BMS to accept the new cell's profile and clear the alarm.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEagle 4000 failing to complete boot sequence after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge during storage. If the voltage drops below the Eagle 4000's BMS recovery threshold — typically around 10.8V for a 12V Ni-MH pack — the monitor will not complete its boot sequence and may show no response at all. Connect the device to AC power and allow a supervised charge of at least two hours before attempting a power-on. If the cell recovers above the threshold, the boot sequence will resume normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381488484442,"sku":"BWCS-GME400MD-1","price":96.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381488517210,"sku":"BWCS-GME400MD-2","price":113.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381488549978,"sku":"BWCS-GME400MD-3","price":126.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GME400MD-1.webp?v=1778901265","url":"https:\/\/batteryweb.com\/products\/marquette-eagle-4000-replacement-battery-12v-2800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}