{"product_id":"nsk-endo-mate-dt-replacement-battery-12v-800mah-ni-mh","title":"NSK Endo-Mate DT Replacement Battery 12V 800mAh U421-070","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNSK Endo-Mate DT — 12V Ni-MH Replacement Battery (U421-070)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V, 800mAh Ni-MH replacement battery for the NSK Endo-Mate DT endodontic motor. It fits the Endo-Mate DT handpiece used in root canal procedures and replaces OEM part U421-070 directly. Voltage and capacity match the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEndo-Mate DT and EndoMate DT compatibility:\u003c\/strong\u003e\n    Both model designations refer to the same NSK endodontic motor platform. They share the same 12V power rail, U421-070 form factor, and BMS handshake protocol — one battery covers both.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Endo-Mate DT's charge and load sequence. The BMS accepted the new cell without fault codes, and charge termination triggered correctly at full capacity on the second cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use protocol for clinical equipment:\u003c\/strong\u003e\n    After installing this battery, allow the Endo-Mate DT to complete its full power-on self-test without interruption. The device runs a BMS verification routine at startup — cutting power during this sequence triggers a false battery fault that persists until the next complete 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 Endo-Mate DT shows a low battery alarm immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Endo-Mate DT's charge IC compares the new cell's voltage profile against thresholds calibrated for a conditioned OEM cell. A fresh replacement Ni-MH cell has not yet established its full charge curve, so the BMS reads it as below threshold even when the charger has completed. This is not a fault with the battery — it is a learn-cycle artefact. Run one complete charge-to-discharge-to-charge cycle before clinical use and the alarm clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEndo-Mate DT not powering on after the battery sat unused 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 battery stored for several months can drop below the BMS recovery threshold — typically around 9V on a 12V Ni-MH pack — and the device will not power on at all. Place the battery on charge immediately and leave it for a full charge cycle. If the charger does not begin the charge sequence, the cell voltage may be below 9V; in that case, a brief trickle-charge pre-condition is needed before the main charge cycle will initiate.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381459124314,"sku":"BWCS-NSL421MD-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381459157082,"sku":"BWCS-NSL421MD-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381459189850,"sku":"BWCS-NSL421MD-3","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NSL421MD-1.webp?v=1778901015","url":"https:\/\/batteryweb.com\/products\/nsk-endo-mate-dt-replacement-battery-12v-800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}