{"product_id":"contec-hms7500-replacement-battery-74v-5200mah-li-ion","title":"CONTEC HMS7500 Patient Monitor Replacement Battery 7.4V 5200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCONTEC HMS7500 — 7.4V Li-ion Replacement Battery (2.3.02.00200)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 5200mAh Li-ion battery replaces OEM part 2.3.02.00200 in the CONTEC HMS7500 portable patient monitor. The HMS7500 is a clinical and home healthcare device that measures SpO2, blood pressure, and heart rate. This replacement matches the original voltage, capacity, and connector configuration for the HMS7500 platform.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHMS7500 platform fit:\u003c\/strong\u003e\n    The HMS7500 uses a closed BMS handshake that validates cell voltage and internal resistance at startup. This battery meets those thresholds — the monitor completes its power-on self-test without triggering a battery fault flag.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the HMS7500's charge IC and monitored BMS communication. The battery accepted a full charge, held voltage under the device's combined sensor load, and passed the monitor's internal battery validation routine.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap self-test procedure:\u003c\/strong\u003e\n    After installing this battery, allow the HMS7500 to complete its full power-on self-test without interruption. The BMS runs a verification sequence at boot — cutting power mid-cycle writes a false battery fault to memory that persists until the next clean full 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 HMS7500 alarms low battery immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe HMS7500's BMS compares the new cell's internal resistance profile against stored OEM parameters at first boot. A fresh cell that hasn't completed one full charge-discharge cycle hasn't yet settled to its rated resistance values, so the BMS flags a low battery condition even when the cell is at full capacity. This is a calibration gap, not a defective battery. Run one complete charge-discharge cycle on the device before clinical use — the BMS recalibrates on the second boot and the alarm clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHMS7500 will not power on after battery arrived from storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during shipping and warehousing. If the cell voltage has dropped below approximately 2.5V per cell (5.0V pack total), the HMS7500's BMS enters deep-discharge lockout and the device shows no response — no boot screen, no alarm. Connect the monitor to mains power and leave it on charge for a minimum of two hours before attempting to power on. The charge IC applies a slow pre-charge trickle at low voltage to recover the cell, then resumes normal charging once the pack clears 6.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381358526554,"sku":"BWCS-CMS750MD-1","price":53.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381358559322,"sku":"BWCS-CMS750MD-2","price":63.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381358592090,"sku":"BWCS-CMS750MD-3","price":70.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CMS750MD-1.webp?v=1778900174","url":"https:\/\/batteryweb.com\/products\/contec-hms7500-replacement-battery-74v-5200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}