{"product_id":"eton-ecg-1a-replacement-battery-12v-2000mah-ni-mh","title":"Eton ECG-1A Medical Device Replacement Battery 12V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEton ECG-1A \/ ECG-2201 Series — 12V Ni-MH Replacement Battery (HYHB-1172)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the HYHB-1172 replacement battery for the Eton ECG-1A, ECG-2201G, ECG-2201, and ECG-2303B portable electrocardiograph devices. It runs at 12V with a 2000mAh (24Wh) Ni-MH cell pack. The battery slots into the device's internal bay and powers the unit during patient ECG recordings.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eECG-1A and ECG-2201 series compatibility:\u003c\/strong\u003e\n    These models share the same 12V power rail, connector pinout, and BMS handshake protocol, which is why a single part number covers all of them. Voltage tolerance across the pack matches what the device's charge IC expects at both full charge and cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on a calibrated load matching the ECG's draw profile. The BMS held cutoff within spec and did not trip false-low during the load transitions that occur when the ECG's signal acquisition circuit activates.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test cycle:\u003c\/strong\u003e\n    After fitting this battery, allow the ECG device to complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power mid-sequence flags a persistent battery fault that does not clear until the next complete 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-1A reports a battery fault after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ECG-1A's BMS compares the incoming cell's charge curve against a stored OEM reference profile. A new Ni-MH pack has not yet established a consistent delta-peak signature, so the BMS can misread charge termination and flag a fault. This is a chemistry calibration gap, not a defective cell. Running one complete charge-discharge cycle lets the BMS update its reference and clears the fault on subsequent charges. After that first cycle, the charge indicator and fault status behave normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice shuts off mid-recording during the first few uses\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew Ni-MH cells have higher internal resistance in the first several cycles, and the ECG's load profile during active signal acquisition draws enough current to cause a brief voltage sag. If that sag drops below the BMS low-voltage cutoff threshold — typically around 9.6V on a 12V Ni-MH pack — the device shuts off as a protection event, not a capacity failure. This resolves progressively over the first eight to ten charge-discharge cycles as internal resistance drops and the pack reaches full electrochemical conditioning. Do not use this battery for clinical recordings until it has completed those conditioning cycles.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381486420058,"sku":"BWCS-BCG220MD-1","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381486452826,"sku":"BWCS-BCG220MD-2","price":60.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381486485594,"sku":"BWCS-BCG220MD-3","price":66.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BCG220MD-1.webp?v=1778901170","url":"https:\/\/batteryweb.com\/products\/eton-ecg-1a-replacement-battery-12v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}