{"product_id":"nihon-kohden-cardiolife-ecg-9320-replacement-battery-12v-2900mah-sealed-lead-acid","title":"Nihon Kohden Cardiolife ECG-9320 Replacement Battery 12V 2900mAh LC-S2912NK","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNihon Kohden Cardiolife ECG-9320 Series — 12V Sealed Lead Acid Replacement Battery (LC-S2912NK)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V 2900mAh sealed lead-acid replacement battery for the Nihon Kohden Cardiolife ECG-9320 defibrillator series. It fits the ECG-9320, TEC-7431, TEC-7511, and TEC-7521 platforms. The OEM part number is LC-S2912NK.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCardiolife TEC and ECG-9320 platform fit:\u003c\/strong\u003e\n    These models share the same 12V SLA bay, connector pinout, and BMS handshake protocol. One battery revision covers the full range listed above without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell under the ECG-9320 charge profile and confirmed the BMS accepted the cell, completed the charge handshake, and held voltage within the device's operating window across repeated discharge cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this battery, allow the Cardiolife unit to complete its full power-on self-test without interruption. The device runs a BMS verification at startup — cutting power mid-sequence triggers a false battery fault that persists until the next full reboot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery alarm immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Cardiolife's BMS compares the new cell's resting voltage against a threshold calibrated to the OEM cell's charge curve. A fresh SLA cell often presents a resting voltage slightly below that threshold on the first cycle, triggering the alarm even when the cell is fully charged. This is a calibration mismatch, not a faulty battery. Run one complete charge-discharge cycle on the device before drawing any conclusion about battery health. After that cycle the BMS re-evaluates the cell and the alarm clears at approximately 12.6–12.8V resting voltage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice will not power on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSealed lead-acid cells self-discharge at roughly 3–5% per month. If this battery was stored before installation and voltage dropped below 10.5V, the Cardiolife's BMS will refuse to initialise — the device shows nothing on power-on. Connect the unit to mains and leave it on charge for a full uninterrupted cycle, typically 24 hours. The charger will apply a recovery trickle below the BMS threshold before stepping up to bulk charge. Once resting voltage recovers above 11V the device will boot normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381515386970,"sku":"BWCS-NK9320MD-1","price":117.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381515419738,"sku":"BWCS-NK9320MD-2","price":138.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381515452506,"sku":"BWCS-NK9320MD-3","price":154.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK9320MD-1.webp?v=1778901340","url":"https:\/\/batteryweb.com\/products\/nihon-kohden-cardiolife-ecg-9320-replacement-battery-12v-2900mah-sealed-lead-acid","provider":"BatteryWeb","version":"1.0","type":"link"}