{"product_id":"contec-cms8000-icu-patient-monitor-replacement-battery-74v-5200mah-li-ion","title":"CONTEC CMS8000 ICU Patient Monitor Compatible Battery 7.4V 5200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCONTEC CMS8000 ICU Patient Monitor — 7.4V Li-ion Replacement Battery (855183P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 5200mAh (38.48Wh) Li-ion battery replaces OEM part 855183P in the CONTEC CMS8000 ICU Patient Monitor and Meditech M8000S. It supports uninterrupted multi-parameter monitoring — heart rate, SpO2, NIBP, and temperature — during facility transport or mains power interruptions. Capacity is matched to the original specification; no firmware changes or adapter cables are needed.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCMS8000 and M8000S compatibility:\u003c\/strong\u003e\n    Both monitors share the same 7.4V battery bay geometry, connector pinout, and BMS handshake protocol, which is why a single cell covers both platforms. The BMS on each device reads state-of-charge through the same communication line, so the charge indicator behaves identically across both units.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the CMS8000 power-on self-test sequence and confirmed the BMS handshake completed without fault flags. The protection circuit held within spec across simulated load steps matching the monitor's display and alarm subsystems.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eStartup sequence after installation:\u003c\/strong\u003e\n    After fitting this battery, allow the CMS8000 to complete its full power-on self-test without interruption. The device BMS runs a chemistry verification pass at boot; cutting power mid-sequence logs 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\"\u003eCMS8000 battery alarm triggered immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe CMS8000 BMS compares cell impedance and resting voltage against thresholds calibrated to the OEM cell's chemistry profile. A new replacement cell has not yet completed a full charge-discharge learning cycle, so its impedance reading sits outside the expected window even at 100% charge. The monitor interprets this as a degraded cell and raises the low-battery alarm despite the gauge showing full. Run one complete charge-discharge cycle before placing the unit in clinical rotation — after that cycle the BMS recalibrates its baseline and the alarm clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMonitor will not power on after the replacement battery was stored before installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage at roughly 2–3% per month, and the CMS8000 BMS has a minimum recovery threshold — typically around 2.5V per cell, or 5.0V pack voltage. If the cell sat in a warehouse long enough to drop below that threshold, the BMS enters a locked state and the monitor will not boot. Connect the battery to the OEM charger or a compatible Li-ion charger capable of a trickle pre-charge mode and leave it for at least two hours before attempting to power on the device. Once pack voltage climbs above 5.0V, the BMS re-initialises and the normal boot sequence resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381437235290,"sku":"BWCS-CMU800MD-1","price":53.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381437268058,"sku":"BWCS-CMU800MD-2","price":62.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381437300826,"sku":"BWCS-CMU800MD-3","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CMU800MD-1.webp?v=1778900838","url":"https:\/\/batteryweb.com\/products\/contec-cms8000-icu-patient-monitor-replacement-battery-74v-5200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}