{"product_id":"carewell-ecg-1112-replacement-battery-144v-5200mah-li-ion","title":"Carewell ECG-1112 14.4V 5200mAh Li-ion Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCarewell ECG-1112 \/ ECG-1112L — 14.4V Li-ion Replacement Battery (88889260)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.4V, 5200mAh (74.88Wh) lithium-ion battery for the Carewell ECG-1112 and ECG-1112L portable electrocardiogram devices. It replaces OEM part number 88889260. The ECG-1112 is a handheld cardiac monitoring system used in clinical and home diagnostic settings.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eECG-1112 and ECG-1112L compatibility:\u003c\/strong\u003e\n    Both models use the same 14.4V battery bay, connector pinout, and BMS handshake protocol. The cell configuration and charge termination voltage are identical across the two variants, so this battery fits either unit without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the ECG-1112's charge IC and monitored the BMS communication at startup. The protection circuit engaged correctly at both low-voltage cutoff and over-current thresholds, and the device completed its power-on self-test without a battery fault flag on each run.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eStartup self-test protocol:\u003c\/strong\u003e\n    After installing this battery, allow the ECG-1112 to complete its full power-on self-test cycle without interruption. The device runs a BMS verification sequence at boot — cutting power mid-sequence causes 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\"\u003eECG-1112 not completing boot sequence on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ECG-1112 runs a BMS learn cycle during its first few boot sequences after a battery swap. If the new cell's state-of-charge does not meet the device's internal threshold — typically above 12.5V resting — the boot sequence aborts before displaying the main screen. This is not a fault with the battery itself; it is the device's charge IC applying a conservative acceptance window to an unrecognised cell. Charge the battery fully before the first use, confirm resting voltage is at or above 16.2V post-charge, then power on.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery alarm triggers immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the ECG-1112's BMS compares internal impedance readings against stored OEM cell parameters — a new replacement cell has not yet completed its first calibration cycle, so impedance reads artificially high and trips the low-battery threshold even at full charge. Run one complete charge-to-discharge-to-charge cycle under normal device operation. After that cycle, the BMS recalibrates its impedance baseline and the alarm clears. Do not use the device clinically until this cycle is complete.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381454635098,"sku":"BWCS-CRE112MD-1","price":67.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381454667866,"sku":"BWCS-CRE112MD-2","price":79.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381454700634,"sku":"BWCS-CRE112MD-3","price":88.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CRE112MD-1.webp?v=1778900876","url":"https:\/\/batteryweb.com\/products\/carewell-ecg-1112-replacement-battery-144v-5200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}