{"product_id":"ionyx-endy-nt-replacement-battery-36v-700mah-ni-mh","title":"IONYX Endy NT Replacement Battery 3.6V 700mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eIONYX Endy NT Series — 3.6V Ni-MH Replacement Battery (VH803821)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.6V, 700mAh Ni-MH cell replaces the original battery in the Endy NT, Endo Master V2, Apex Express, and Endo Master V3, along with six additional compatible models. All units share the same voltage rail, connector pinout, and OEM part number family (VH803821 \/ BAT003 \/ BAT002). Dimensions are 44.60 × 19.50 × 19.50mm — a direct physical match to the factory cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCross-model compatibility across the Endy NT platform:\u003c\/strong\u003e\n    The Endy NT, Endo Master V2, Apex Express, and Endo Master V3 all run the same 3.6V Ni-MH chemistry and share identical BMS handshake requirements. One cell specification covers the full platform 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 full-load discharge on the Endy NT platform. The BMS accepted the cell cleanly, passed its internal verification sequence, and held voltage within the expected band across the discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this cell, allow the device to complete its full power-on self-test without interrupting power. Medical device BMS firmware runs a verification pass at startup — cutting power mid-sequence triggers 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\"\u003eLow battery alarm on the Endy NT immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Endy NT's charge monitoring firmware compares cell behaviour against stored OEM chemistry thresholds. A new Ni-MH cell delivers a slightly different charge acceptance curve than a broken-in cell, and the BMS can flag it as below threshold even when the cell is fully charged. This is a calibration gap, not a cell fault. One complete charge-discharge cycle allows the BMS to update its reference and the alarm clears. Run the device through one full cycle before clinical use.\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\"\u003eNi-MH cells self-discharge during storage — typically losing 1–2% capacity per day at room temperature. If the cell drops below the Endy NT's BMS recovery threshold (approximately 3.0V for a 3.6V nominal cell), the protection circuit blocks power-on to prevent damage. Connect the device to its charger for a minimum 30-minute pre-charge pass before attempting to boot. Once voltage recovers above the BMS floor, the device powers on normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381382250586,"sku":"BWCS-ENM003MD-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381382283354,"sku":"BWCS-ENM003MD-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381382316122,"sku":"BWCS-ENM003MD-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ENM003MD-1.webp?v=1778900493","url":"https:\/\/batteryweb.com\/products\/ionyx-endy-nt-replacement-battery-36v-700mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}