{"product_id":"cardio-e3-replacement-battery-144v-5200mah-li-ion","title":"Cardio E3 14.4V Replacement Battery INR18650-4S2P 5200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCardio E3 — 14.4V Li-ion Replacement Battery (INR18650-4S2P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.4V, 5200mAh Li-ion battery pack for the Cardio E3 portable cardiac monitoring device. It uses a 4S2P cell configuration — four cells in series, two in parallel — matching the voltage rail and current delivery profile of the original pack. Capacity is sourced from the product specification: 5200mAh \/ 74.88Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE3 platform fit:\u003c\/strong\u003e\n    The Cardio E3 uses a fixed 14.4V bus with a BMS that validates cell chemistry and pack impedance at startup. This replacement matches that voltage rail and uses the same INR18650 cell format, so the BMS handshake completes without a connector or communication mismatch.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through full charge and discharge on the E3 platform. The BMS completed its verification sequence, charge acceptance reached the expected cutoff, and the protection circuit responded correctly to simulated load spikes consistent with the device's monitoring cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eStartup self-test — do not interrupt:\u003c\/strong\u003e\n    After installing this battery, let the E3 complete its full power-on self-test without cycling power. The device runs a BMS verification routine at boot. Cutting power mid-sequence can register a false battery fault that persists across restarts until a clean full reboot clears it.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Cardio E3 rejects a new battery during boot verification\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe E3's BMS compares cell impedance against a stored OEM threshold during startup. A new cell's impedance sits slightly outside that calibrated window until it completes one full charge-discharge cycle. This causes the device to flag the pack as non-compliant even when the battery is fully charged. Run one complete cycle — full charge to full discharge under normal device operation — before using the unit in a clinical setting. After that cycle, impedance drops into the accepted range and the fault clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator stalls below 100% on first charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge, the E3's charge IC applies a conservative current limit to new cells, which can cause the indicator to plateau at 95–98% for an extended period before completing. This is the charge IC behaving correctly — it is conditioning the pack, not stalling. Do not interrupt the charge. Allow it to reach the full termination voltage of 16.8V (4.2V per cell across the 4S configuration) before disconnecting.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381365932122,"sku":"BWCS-CDE300MX-1","price":91.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381365964890,"sku":"BWCS-CDE300MX-2","price":107.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381365997658,"sku":"BWCS-CDE300MX-3","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CDE300MX-1.webp?v=1778900266","url":"https:\/\/batteryweb.com\/products\/cardio-e3-replacement-battery-144v-5200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}