{"product_id":"contec-ecg-600g-replacement-battery-74v-3800mah-li-polymer","title":"855183P-2S CONTEC ECG-600G Replacement Battery 7.4V 3800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCONTEC ECG-600G — 7.4V Li-Polymer Replacement Battery (855183P-2S)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 3800mAh Li-Polymer battery replaces the CONTEC part number 855183P-2S in the ECG-600G portable electrocardiograph. It fits the ECG-600G used in clinical and mobile cardiac monitoring workflows. Voltage and cell chemistry match the original specification at 7.4V and 28.12Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eECG-600G platform fit:\u003c\/strong\u003e\n    The ECG-600G runs a fixed 7.4V two-cell Li-Polymer configuration with a BMS handshake tied to cell chemistry. Swapping to a different voltage or cell format breaks that handshake and triggers a persistent battery fault on the device.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the ECG-600G platform. The BMS accepted the cell, completed its verification pass, and reported state-of-charge accurately across the discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap power-on sequence:\u003c\/strong\u003e\n    After installing this battery, let the ECG-600G complete its full power-on self-test without interruption. The device runs a BMS verification step at startup — cutting power during this window 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-600G not completing boot sequence after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ECG-600G runs a startup self-test that includes a BMS handshake before the main interface loads. A new cell that has not completed its first full charge cycle may sit just below the voltage threshold the device expects at boot. The device interprets this as a fault and halts the sequence. Charge the battery fully before the first installation — confirm the charger has reached 8.4V before fitting the cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator stalling below 100% on first charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge, the ECG-600G charge IC applies a conservative current limit to a new Li-Polymer cell it has not previously profiled. This causes the charge indicator to plateau at 90–95% and stall for an extended period before completing. This is normal behaviour on the first cycle and resolves after one full charge-discharge pass. Do not interrupt the charge — let the cycle finish completely so the charge IC can update its cell model.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381454143578,"sku":"BWCS-CME600MD-1","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381454176346,"sku":"BWCS-CME600MD-2","price":55.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381454209114,"sku":"BWCS-CME600MD-3","price":61.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CME600MD-1.webp?v=1778900876","url":"https:\/\/batteryweb.com\/products\/contec-ecg-600g-replacement-battery-74v-3800mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}