{"product_id":"vdw-raypex-5-replacement-battery-36v-900mah-ni-mh","title":"VDW Raypex 5 Replacement Battery 3.6V 900mAh 85AAAHC","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVDW Raypex 5 — 3.6V Ni-MH Replacement Battery (85AAAHC)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V 900mAh Ni-MH replacement battery for the VDW Raypex 5 endodontic apex locator and motor. It fits the cordless handpiece used in root canal procedures when the original cell has degraded below clinical operating threshold. Cross-references include OEM part numbers 0520468, 141000507, GP75AAAH3TMJ, and 91505801.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRaypex 5 fitment:\u003c\/strong\u003e\n    The Raypex 5 uses a compact 3.6V Ni-MH cell pack to match the motor controller's voltage rail and BMS communication protocol. Substituting lithium chemistry will trip the charge IC — only Ni-MH cells at this voltage satisfy the internal handshake.\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 the Raypex 5 platform. The BMS completed its verification sequence on the second cycle, with charge acceptance stabilising at full rated capacity from cycle three onward.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap startup protocol:\u003c\/strong\u003e\n    After installing this battery, allow the Raypex 5 to complete its full power-on self-test without interrupting it. The device runs a BMS verification at startup — breaking that sequence before it finishes stores a false battery fault that persists until the next clean reboot cycle.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Raypex 5 rejects a new Ni-MH cell in the first two charge cycles\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Raypex 5 charge IC applies a conservative current limit when it reads internal resistance above the OEM cell baseline. A fresh Ni-MH cell straight from storage has higher internal resistance than a conditioned one, so the charger throttles back and may stop short of 100%. This is not a fault — it resolves after one full charge-discharge cycle lowers the cell's resistance into the expected window. Do not interrupt the first charge; let it run to natural termination.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery alarm triggers immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Raypex 5 BMS compares resting cell voltage against a threshold calibrated to a fully conditioned OEM cell. A new replacement cell holds a slightly lower open-circuit voltage on its first charge, which can sit just below that threshold and trigger the alarm even though the cell is not depleted. Run one complete charge-discharge cycle before clinical use. After that conditioning cycle, resting voltage on a 3.6V Ni-MH cell should read between 3.8V and 4.1V at the terminals, which clears the alarm threshold reliably.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381459615834,"sku":"BWCS-DSC500MD-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381459648602,"sku":"BWCS-DSC500MD-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381459681370,"sku":"BWCS-DSC500MD-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DSC500MD-1.webp?v=1778900983","url":"https:\/\/batteryweb.com\/products\/vdw-raypex-5-replacement-battery-36v-900mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}