{"product_id":"osen-ecg-8110-replacement-battery-12v-2000mah-ni-mh","title":"OSEN ECG-8110 Replacement Battery BF4500AH10 12V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eOSEN ECG-8110 \/ ECG-8110A — 12V Ni-MH Replacement Battery (BF4500AH10)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V 2000mAh Ni-MH replacement battery for the OSEN ECG-8110 and ECG-8110A portable electrocardiograph. It replaces OEM part BF4500AH10 and fits the same battery bay without modification. Capacity is rated at 24Wh per the product specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eECG-8110 and ECG-8110A compatibility:\u003c\/strong\u003e\n    Both units share the same 12V battery architecture, connector pinout, and BMS communication protocol — one cell covers both. The voltage rail and physical dimensions (83.90 × 43.00 × 33.60mm) match the OEM cavity exactly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge-discharge cycles on the ECG-8110 platform. The BMS accepted the cell, completed its initialisation handshake, and the charge indicator advanced normally. No fault codes were triggered across repeat cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test cycle:\u003c\/strong\u003e\n    After fitting this battery, let the device complete its full power-on self-test without interruption. The ECG-8110's BMS runs a verification sequence at startup — cutting power mid-cycle 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 ECG-8110 flags a battery fault on the first boot after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ECG-8110 uses a BMS that stores a chemistry profile from the previous cell. When a new Ni-MH cell is installed, the BMS compares its initial voltage response against the stored threshold — a fresh cell that hasn't been cycled yet can read slightly outside that window. This triggers a battery fault flag on first boot even when the cell is fully charged. One complete charge-discharge cycle lets the BMS recalibrate to the new cell's actual voltage curve. After that cycle, the fault clears and does not return.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator not reaching 100% on the first charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge after installation, the ECG-8110's charge IC applies a conservative current limit to an unrecognised cell — it terminates early rather than risk overcharging an unknown chemistry state. This is not a cell fault. Discharge the battery fully through normal device use, then run a second full charge. The charge IC adjusts its termination threshold after that first cycle and the indicator will reach 100% consistently from the second charge onward.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381506310234,"sku":"BWCS-ECG811MD-1","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381506343002,"sku":"BWCS-ECG811MD-2","price":57.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381506375770,"sku":"BWCS-ECG811MD-3","price":63.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ECG811MD-1.webp?v=1778901305","url":"https:\/\/batteryweb.com\/products\/osen-ecg-8110-replacement-battery-12v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}