{"product_id":"t-mobile-revvl-4-plus-replacement-battery-385v-3850mah-li-polymer","title":"T-Mobile Revvl 4 Plus Compatible Battery TLP038D7 3.85V 3850mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eT-Mobile Revvl 4 Plus — 3.85V Li-Polymer Replacement Battery (TLP038D7)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3850mAh Li-Polymer cell at 3.85V, built to replace the original TLP038D7 battery in the T-Mobile Revvl 4 Plus (models 5062W and 5062Z). It fits phones that have lost capacity after extended use or stopped holding a charge. Dimensions are 83.10 × 62.68 × 4.30mm — match these before installation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRevvl 4 Plus 5062W and 5062Z compatibility:\u003c\/strong\u003e\n    Both model variants share the same battery bay geometry, connector pinout, and BMS handshake protocol — one cell fits both 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 discharge on the 5062 platform. The BMS accepted the cell on first connect, voltage held stable under screen-on and modem load, and charge termination triggered correctly at 4.35V.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one full discharge-charge cycle at standard current. This allows the fuel gauge IC to recalibrate its coulomb counter against the new cell's discharge curve before high-current charging begins.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Revvl 4 Plus after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell has a slightly different voltage-to-capacity curve than the aged original. The fuel gauge IC still uses the old curve, so it reads 25% remaining when the actual cell voltage has already dropped below the modem's minimum threshold. Under a burst of LTE traffic or screen wake, the voltage sags further and the phone shuts down. One full discharge-charge cycle resets the coulomb counter and brings the reported percentage back in line with actual cell state.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle after installation, the charge IC may default to trickle or standard current until it verifies the new cell's internal resistance and temperature profile. This is a BMS protection step, not a fault. Do not assume the cable or charger is defective. Complete one full standard-rate charge cycle — fast charge negotiation typically resumes normally from the second cycle onward.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391897305178,"sku":"BWCS-TMR506SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391897337946,"sku":"BWCS-TMR506SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391897370714,"sku":"BWCS-TMR506SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TMR506SL-1.webp?v=1779142626","url":"https:\/\/batteryweb.com\/products\/t-mobile-revvl-4-plus-replacement-battery-385v-3850mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}