{"product_id":"covidien-n550-replacement-battery-96v-3800mah-ni-mh","title":"Covidien N550 Medical Device Replacement Battery 9.6V 3800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCovidien N550 \/ N560 — 9.6V Ni-MH Replacement Battery (069308)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9.6V Ni-MH replacement battery for the Covidien N550 and N560 portable patient monitoring devices. It carries a capacity of 3800mAh (36.48Wh) and matches OEM part number 069308. The battery restores power to units where the original cell has degraded beyond the device's BMS acceptance threshold.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eN550 and N560 platform compatibility:\u003c\/strong\u003e\n    Both models share the same 9.6V battery rail, connector housing, and BMS handshake protocol, which is why a single cell fits either unit without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a clinical monitoring test rig. The BMS completed its self-test sequence without triggering a fault flag, and the cell held voltage within spec through full load cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test cycle:\u003c\/strong\u003e\n    After fitting this battery, let the device complete its full power-on self-test without interruption. The N550 and N560 run a BMS verification routine at startup — cutting power during this sequence 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\"\u003eWhy the N550 reports a battery fault on a brand-new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe N550 BMS stores chemistry calibration data from the original cell. A fresh Ni-MH replacement starts with no charge history, so the BMS may flag it as non-conforming on the first boot. This is a learn-cycle issue, not a defective cell. Running one full charge-discharge cycle gives the BMS enough data to accept the new cell. After that first cycle, the fault flag clears and the device behaves normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator stalls below 100% on first charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells ship in a partially discharged state, and the N550 charge IC applies a conservative current limit when it cannot confirm the cell's starting capacity. This causes the charge indicator to plateau or stall before reaching full. The fix is to let the charge cycle run to natural termination without removing the device from the charger. After the first complete charge, the IC recalibrates and subsequent charges reach 100% as expected — confirm this at approximately 10.8V fully charged.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381499953242,"sku":"BWCS-NPT550MD-1","price":73.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381499986010,"sku":"BWCS-NPT550MD-2","price":86.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381500018778,"sku":"BWCS-NPT550MD-3","price":95.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NPT550MD-1.webp?v=1778901266","url":"https:\/\/batteryweb.com\/products\/covidien-n550-replacement-battery-96v-3800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}