{"product_id":"mindray-sp1-replacement-battery-74v-3400mah-li-ion","title":"Mindray SP1 Patient Monitor Replacement Battery 7.4V 3400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMindray SP1 Series — 7.4V Li-ion Replacement Battery (ICR18650-2S)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 3400mAh Li-ion battery replaces the ICR18650-2S (OEM ref 115-068528-00) in the Mindray SP1 portable patient monitor. It also fits the SP1 Syringe Pump, SK-801 EX, BeneFusion VP3, and eleven additional models sharing this voltage rail and connector format. Capacity matches the original at 3400mAh (25.16Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-model compatibility across SP1 and BeneFusion platforms:\u003c\/strong\u003e\n    These devices share a common 7.4V two-cell configuration, identical connector pinout, and the same BMS communication protocol — which is why one cell fits across all listed models without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran full charge and discharge cycles on this cell, confirming the BMS handshake completes correctly and protection thresholds — overcurrent, over-temperature, and low-voltage cutoff — trigger within spec.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test on Mindray SP1:\u003c\/strong\u003e\n    After fitting this battery, allow the device to complete its full power-on self-test without interruption. The SP1 runs a BMS verification sequence at startup — cutting power during this window logs 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\"\u003eWhy the SP1 alarms low battery immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SP1's charge IC applies conservative acceptance thresholds calibrated to the OEM cell's internal resistance profile. A new third-party cell has a slightly different impedance signature, so the BMS can flag it as below threshold on the first cycle even when the cell is fully charged. This is not a fault — it resolves after one complete charge-discharge cycle, which lets the BMS learn the new cell's characteristics. Run that cycle before returning the device to clinical use.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSP1 will not power on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage, and if the pack drops below roughly 2.5V per cell (5.0V total), the BMS enters deep-discharge lockout and blocks output to protect the cells. The SP1 will show no response — no boot, no charging indicator. Connect the device to mains power and leave it for a minimum of 30 minutes before attempting to power on; the charger applies a trickle current that brings the pack above the BMS recovery threshold. If the indicator still does not respond after 60 minutes on charge, check the charger output at the connector — it should read between 8.2V and 8.4V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381448441946,"sku":"BWCS-MRP100MX-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381448474714,"sku":"BWCS-MRP100MX-2","price":44.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381448507482,"sku":"BWCS-MRP100MX-3","price":48.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MRP100MX-1.webp?v=1778900876","url":"https:\/\/batteryweb.com\/products\/mindray-sp1-replacement-battery-74v-3400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}