{"product_id":"sony-ericsson-xperia-t2-ultra-d5303-lte-replacement-battery-38v-3000mah-li-polymer","title":"Sony Ericsson Xperia T2 Ultra Replacement Battery AGPB012-A001 3.8V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony Ericsson Xperia T2 Ultra D5303 LTE — 3.8V Li-Polymer Replacement Battery (AGPB012-A001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3000mAh, 3.8V lithium-polymer battery for the Sony Ericsson Xperia T2 Ultra D5303 LTE smartphone. It also fits the D5303 non-LTE variant, Xperia T2 Ultra Dual, and the Tianchi model. Swap it in when the original cell no longer holds adequate charge or fails to power on.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eT2 Ultra D5303 platform fit:\u003c\/strong\u003e\n    All listed T2 Ultra variants share the same 3.8V battery bay, connector pinout, and BMS handshake protocol — single and dual SIM boards included. One cell fits the full family.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a D5303 LTE board and confirmed the BMS handshake completed on first boot. The charge IC accepted the cell without error flags and the protection circuit tripped correctly at low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    Disable fast charging for one full discharge-charge cycle after fitting this cell. The fuel gauge IC on the T2 Ultra calibrates its coulomb counter against the cell's discharge curve on that first cycle — fast charging during this window pushes current into an uncalibrated cell and skews percentage readings for weeks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Xperia T2 Ultra reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe T2 Ultra uses a fuel gauge IC that tracks charge state by counting coulombs against a stored discharge curve from the original cell. A new cell has a different internal resistance profile, so the stored curve no longer matches. Until the IC runs one full uninterrupted discharge from 100% to auto-off and back to full charge, the percentage display is interpolating against stale data. After that calibration cycle, percentage accuracy returns to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the T2 Ultra\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff failure, not a capacity problem. When the LTE modem or the large 720p display pulls high current, a cell with elevated internal impedance drops below the BMS cutoff threshold momentarily — the phone shuts off even though the reported percentage looks fine. It happens most often during LTE data bursts or full-brightness video. Check the cell voltage under load with a USB meter or battery app; if it dips below 3.4V during active use, the cell impedance is too high and the replacement needs to be reseated or checked for a pinched connector.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404276269146,"sku":"BWCS-ERM500SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404276301914,"sku":"BWCS-ERM500SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404276334682,"sku":"BWCS-ERM500SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ERM500SL-1.webp?v=1779369550","url":"https:\/\/batteryweb.com\/products\/sony-ericsson-xperia-t2-ultra-d5303-lte-replacement-battery-38v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}