{"product_id":"diversified-medical-n-n1218wc3-replacement-battery-12v-3000mah-ni-mh","title":"Diversified Medical N1218WC3 Replacement Battery 12V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDiversified Medical N N1218WC3 — 12V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V, 3000mAh Ni-MH replacement battery for the Diversified Medical N N1218WC3 patient monitoring instrument. It matches the original cell format, voltage rail, and connector orientation for that unit. Capacity is rated at 36Wh from the product specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eN N1218WC3 platform fit:\u003c\/strong\u003e\n    The N1218WC3 runs a 12V internal rail with a BMS that checks cell chemistry and voltage signature at power-on. Ni-MH chemistry is what the charge IC on this platform expects — substituting a different chemistry trips a persistent battery fault in the firmware.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on a medical-grade load tester, confirming the BMS handshake completed without fault codes and that capacity came within spec by the second full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePower-on self-test cycle:\u003c\/strong\u003e\n    After installing this battery, let the N N1218WC3 complete its full startup self-test without interrupting power. Medical devices run a BMS verification pass at boot — cutting power mid-sequence writes a false battery fault flag 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\"\u003eWhy the N N1218WC3 flags a battery fault after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BMS on this device stores a learned capacity threshold based on its previous cell. A new Ni-MH cell has slightly different internal resistance and voltage curve characteristics compared to a degraded OEM cell. On the first charge, the BMS may flag the battery as non-conforming because the cell hasn't yet completed the learn cycle. Run one full charge-to-discharge cycle before clinical use — the BMS recalibrates its threshold on that pass and clears the fault.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not completing boot sequence after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge at roughly 1–2% per day in storage. If this battery arrived after extended transit or shelf time, its resting voltage may have dropped below the BMS recovery threshold — typically around 10.5V on a 12V Ni-MH pack. The device will stall mid-boot or refuse to power on entirely when it reads that voltage. Connect the charger and allow a full uninterrupted charge cycle before attempting to boot; the charge IC will trickle-charge the pack back above the recovery floor first.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381517516890,"sku":"BWCS-AMS723MD-1","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381517549658,"sku":"BWCS-AMS723MD-2","price":48.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381517582426,"sku":"BWCS-AMS723MD-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AMS723MD-1.webp?v=1778901368","url":"https:\/\/batteryweb.com\/products\/diversified-medical-n-n1218wc3-replacement-battery-12v-3000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}