{"product_id":"t-mobile-revvlry-replacement-battery-38v-2900mah-li-polymer","title":"T-Mobile Revvlry XT1952-T Replacement Battery 3.8V 2900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eT-Mobile Revvlry (XT1952-T) — 3.8V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 2900mAh lithium-polymer cell is a direct replacement for the T-Mobile Revvlry (model XT1952-T). It fits phones where the original cell has degraded, swells, or fails to hold voltage under screen and modem load. Rated at 11.02Wh, capacity matches the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRevvlry \/ XT1952-T fit:\u003c\/strong\u003e\n    Both model names reference the same hardware — one is the T-Mobile carrier designation, the other the Motorola internal model number. The connector pinout, cell dimensions (73.25 × 61.64 × 3.76mm), and BMS handshake are identical across both. One battery covers both references.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge acceptance, BMS cutoff verification, and voltage hold under sustained screen-on load. The BMS triggered protection at the correct low-voltage threshold and accepted charge current without false cutoff on the first cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    After installing this cell, disable fast charging and run one complete discharge-to-charge cycle. The Revvlry's fuel gauge IC is calibrated against the old cell's discharge curve. One full cycle lets it re-map against the new cell before fast charge pushes higher current into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Revvlry reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe XT1952-T uses a coulomb counter inside the fuel gauge IC to track charge state. That counter is calibrated against the impedance and discharge curve of the original cell. A new cell has different internal resistance, so the IC miscalculates state-of-charge immediately after replacement. The phone may read 80% when the cell is near full, or drop percentage faster than expected in the first few cycles. After one full discharge below 10% and a complete charge to 100%, the IC re-maps its curve and percentage reporting stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below what the modem and display collectively demand during peak load — even though the percentage gauge still reads above zero. Lithium-polymer cells have a voltage cliff near the bottom of their discharge curve; a new cell that hasn't been through a calibration cycle hits that cliff while the fuel gauge still shows charge remaining. The fix is a full discharge-to-shutdown, then a complete charge to 100% without interruption. After that cycle, the fuel gauge IC anchors its low-voltage endpoint correctly and the shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392017137754,"sku":"BWCS-MXT196XL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392017170522,"sku":"BWCS-MXT196XL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392017203290,"sku":"BWCS-MXT196XL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MXT196XL-1.webp?v=1779142904","url":"https:\/\/batteryweb.com\/products\/t-mobile-revvlry-replacement-battery-38v-2900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}