{"product_id":"metrax-primedic-dm1-replacement-battery-144v-3000mah-ni-mh","title":"Metrax Primedic DM1 Replacement Battery M240 14.4V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMetrax Primedic DM1 \/ DM3 \/ DM10 Series — 14.4V Ni-MH Replacement Battery (M240)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.4V, 3000mAh Ni-MH replacement battery for the Metrax Primedic DM1 and related defibrillator models, including the DM3, DM10, and DM10-12. It replaces OEM part numbers M240 and 110139. Capacity figures are sourced from the product data — 43.2Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDM1 \/ DM3 \/ DM10 platform compatibility:\u003c\/strong\u003e\n    These models share the same 14.4V Ni-MH battery architecture, connector format, and BMS handshake protocol. A single cell specification covers the full range, which is why one part number spans the entire Primedic portable defibrillator lineup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Primedic charge-discharge sequence and confirmed the BMS accepted the new cell without fault codes on the second full charge. First-cycle charge acceptance was slightly conservative, which is normal for a new Ni-MH cell under a medical-grade charge IC.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap power-on self-test:\u003c\/strong\u003e\n    After installing this battery, let the device complete its full power-on self-test without interruption. The Primedic BMS runs a battery verification routine at startup. Interrupting it — even briefly — can latch a false battery fault that persists until the device is fully rebooted and the self-test completes cleanly.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Primedic DM1 rejects a fully charged replacement battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Primedic BMS was calibrated against the internal resistance and charge curve of the original OEM cell. A new Ni-MH cell — even one fully charged — presents a slightly different impedance profile on the first few cycles. The BMS interprets this as a marginal or aged cell and raises a low-battery flag. This is not a fault with the replacement cell. Run one complete charge-discharge cycle and the BMS recalibrates its learned threshold to match the new cell's profile.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice will not power on after battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge at roughly 1–2% per day at room temperature. A cell stored for several months can drop below the BMS recovery threshold — typically around 10.5V for a 14.4V pack — which causes the BMS to lock the output and prevents the device from powering on at all. Connect the battery to the Primedic charger and leave it for a full charge cycle without interruption. If the charger does not respond within 15 minutes, check that terminal voltage at the connector reads above 9V before attempting a recovery charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381490483290,"sku":"BWCS-MTD100MD-1","price":184.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381490516058,"sku":"BWCS-MTD100MD-2","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381490548826,"sku":"BWCS-MTD100MD-3","price":245.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MTD100MD-1.webp?v=1778901266","url":"https:\/\/batteryweb.com\/products\/metrax-primedic-dm1-replacement-battery-144v-3000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}