{"product_id":"fresenius-mcm-404-replacement-battery-12v-1800mah-ni-mh","title":"Fresenius MCM 404 Replacement Battery 12V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFresenius MCM 404 \/ Volumed VP 2000 Series — 12V Ni-MH Replacement Battery (120088-1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V 1800mAh Ni-MH battery for the Fresenius MCM 404 and MCM 504 infusion pumps, and the Volumed VP 2000 and VP 5000 volumetric pumps. It replaces OEM part numbers 120088-1, BATT\/110088, 20022, 120022P, and BATT\/110022. The battery provides backup power during patient transport and mains interruptions in clinical settings.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMCM 404, MCM 504, VP 2000, VP 5000 compatibility:\u003c\/strong\u003e\n    These models share the same 12V battery rail, connector pinout, and BMS handshake protocol, which is why a single cell pack covers all four pump platforms without modification.\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-discharge cycles on the MCM 404 platform. The BMS completed its verification handshake without fault flags and accepted the cell across the pump's expected load profile.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePower-on self-test protocol:\u003c\/strong\u003e\n    After installing this battery, let the pump complete its full startup self-test without interruption. Fresenius infusion pumps run a BMS verification sequence at boot — cutting power during this window 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 MCM 404 shows a battery fault after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MCM 404's charge IC uses chemistry-specific thresholds calibrated to a cell that has completed at least one full cycle. A new Ni-MH cell has a slightly higher internal resistance before the first cycle, which the BMS can interpret as a degraded or incompatible pack. The pump may flag a low-battery or fault alarm even when the indicator shows full. Running one complete charge-discharge cycle before clinical use allows the BMS to recalibrate its baseline and clear the fault.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePump will not power on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge at roughly 1–2% per day during storage. If the battery arrived or sat unused for several weeks, its resting voltage may have dropped below the MCM 404's BMS recovery threshold — typically around 10.8V for a 12V pack — causing the pump to refuse to boot entirely. Connect the pump to mains power first and allow a supervised charge cycle to complete before attempting to run on battery alone. Once the cell reaches approximately 12.0V under charge, the BMS will re-initialise and the pump will boot normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381488189530,"sku":"BWCS-FVM404MD-1","price":66.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381488222298,"sku":"BWCS-FVM404MD-2","price":76.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381488255066,"sku":"BWCS-FVM404MD-3","price":84.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FVM404MD-1.webp?v=1778901266","url":"https:\/\/batteryweb.com\/products\/fresenius-mcm-404-replacement-battery-12v-1800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}