{"product_id":"dentsply-ray-pex-5-replacement-battery-36v-900mah-ni-mh","title":"Dentsply Ray-Pex 5 Compatible Battery 3.6V 900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDentsply Ray-Pex 5 Apex Locator — 3.6V Ni-MH Replacement Battery (GP75AAAH3TMJ)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.6V 900mAh Ni-MH cell replaces the rechargeable battery inside the Dentsply Ray-Pex 5 and Ray-Pex 5 Apex Locator handpiece. It fits all Ray-Pex 5 variants where the OEM cell has degraded or lost capacity. Voltage, dimensions, and connector match the original at 45.18 × 21.40 × 19.54mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRay-Pex 5 series compatibility:\u003c\/strong\u003e\n    All Ray-Pex 5 variants share the same internal battery compartment geometry and 3.6V supply rail. The BMS in the locator handpiece expects this specific Ni-MH chemistry — substituting a Li-ion cell of similar voltage will trigger a charge fault because the charge IC uses a delta-V termination algorithm tuned for Ni-MH.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Ray-Pex 5 charge circuit and confirmed the BMS accepted charge termination cleanly, with no false fault flags across three consecutive charge cycles. File detection and measurement functions operated normally throughout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test:\u003c\/strong\u003e\n    After fitting the new cell, allow the Ray-Pex 5 to complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — interrupting it before it finishes stores 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 Ray-Pex 5 alarms low battery with a freshly charged replacement fitted\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Ray-Pex 5 charge IC sets its low-battery threshold against OEM cell chemistry baselines. A new Ni-MH cell has not yet established its internal resistance profile, so the BMS reads a slightly elevated voltage drop under load and interprets it as low charge. This typically clears after one complete charge-discharge cycle. Run the locator through a full clinical session on the new cell, recharge to 100%, and the alarm will not recur.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRay-Pex 5 shuts off mid-procedure during apical measurement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eUnexpected cutoffs during active file measurement point to the BMS tripping on a load-spike threshold, not a capacity problem. Endodontic locators draw a sharp current pulse each time the measurement circuit interrogates the file position — this pulse stresses a new cell harder in the first ten cycles before the electrochemistry stabilises. If cutoffs occur, finish the procedure, allow a full charge, and note whether the behaviour reduces over the next three to five uses. If cutoffs persist beyond ten cycles, check the charger output voltage at the contacts — it should read 4.8–5.2V under no load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381459714138,"sku":"BWCS-DSC500MD-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381459746906,"sku":"BWCS-DSC500MD-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381459779674,"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\/dentsply-ray-pex-5-replacement-battery-36v-900mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}