{"product_id":"orange-reyo-replacement-battery-38v-2000mah-li-ion","title":"Li3720T43P4h825839 Orange Reyo Replacement Battery 3.8V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eOrange Reyo — 3.8V Li-ion Replacement Battery (Li3720T43P4h825839)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2000mAh Li-ion battery for the Orange Reyo smartphone. It matches the OEM part number Li3720T43P4h825839 and fits directly into the Reyo's battery bay. Capacity is 7.6Wh — identical to the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOrange Reyo fit:\u003c\/strong\u003e\n    The Reyo uses a single-cell 3.8V Li-ion pack with a specific connector pitch and BMS handshake tied to the phone's charge IC. This replacement meets that voltage rail and connector spec, so the charge IC accepts it without throwing a battery error.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles on this cell using a programmable load to verify BMS cutoff thresholds. The protection circuit tripped correctly at low-voltage cutoff and released on resume charge — no latched lockout observed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    After fitting this cell, disable fast charging and run one full discharge down to automatic shutdown, then charge uninterrupted to 100%. This gives the Reyo's fuel gauge IC a clean reference curve against the new cell before normal use resumes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Reyo reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Reyo uses a coulomb counter inside the fuel gauge IC that builds its percentage model from learned discharge curves on the original cell. Swapping the cell resets nothing in the IC — it keeps applying the old curve to a new cell with a different internal resistance profile. This mismatch causes the percentage to read high, then drop suddenly. One full uninterrupted discharge-charge cycle forces the IC to relearn the curve against the replacement cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops sharply under load — typically during an LTE transmission burst or screen-on peak draw — before the fuel gauge IC registers the drop in percentage. The phone shuts down because the SoC brown-out threshold is hit, not because the reported percentage reached zero. A degraded or uncalibrated cell hits this voltage cliff earlier than the gauge predicts. Run the recalibration cycle first; if shutdowns persist, check that the battery connector is fully seated and the contact strip is clean before ruling out a faulty cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392083591258,"sku":"BWCS-ZTV818SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392083624026,"sku":"BWCS-ZTV818SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392083656794,"sku":"BWCS-ZTV818SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTV818SL-1.webp?v=1779143708","url":"https:\/\/batteryweb.com\/products\/orange-reyo-replacement-battery-38v-2000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}