{"product_id":"telstra-gt-i9300t-replacement-battery-38v-2100mah-li-ion","title":"Telstra Galaxy S III GT-i9300T Replacement Battery 3.8V 2100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTelstra Galaxy S III GT-i9300T — 3.8V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2100mAh Li-ion replacement battery for the Samsung Galaxy S III GT-i9300T smartphone. It fits the standard battery bay without modification and connects directly to the phone's charge IC and fuel gauge circuit. Capacity is sourced from the product specification — 7.98Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGT-i9300T, Galaxy S III, Galaxy S3 fit:\u003c\/strong\u003e\n    These models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The 63.20 × 50.40 × 5.40mm cell slots flush against the contact rail, and the three-pin connection supplies voltage, ground, and the NTC thermistor line the charge IC needs to regulate current.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on a GT-i9300T unit. The BMS accepted the charge current without tripping, the thermistor line reported correctly, and the fuel gauge IC registered a completed charge cycle by the end of the first run.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first install:\u003c\/strong\u003e\n    Disable fast charging and run one complete discharge-to-charge cycle after fitting this cell. The fuel gauge IC on the GT-i9300T is calibrated to the discharge curve of the old cell. One full cycle lets the coulomb counter reset its reference points against the new cell 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 GT-i9300T after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity fault. Under modem radio or screen load, the new cell's voltage drops faster than the fuel gauge expects at that state of charge. The phone's power IC sees voltage fall below the cutoff threshold and shuts down before the percentage reaches zero. Run one full discharge cycle — draw the battery down to automatic shutdown from 100% — and the coulomb counter recalibrates its curve against actual cell behaviour.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGT-i9300T not powering on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells in storage self-discharge over time. If the voltage drops below approximately 2.5V per cell, the BMS enters lockout mode and the phone will not respond to a normal power-on press. Connect the phone to a wall charger — not a PC USB port — and leave it for 15–20 minutes without attempting to power it on. The charge IC on the GT-i9300T will trickle current into the cell to recover voltage above the BMS re-enable threshold, after which normal charging resumes. If the charge indicator never appears after 30 minutes on wall power, check that the battery connector is fully seated against the three contact pins.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405017088090,"sku":"BWCS-SMI930XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405017120858,"sku":"BWCS-SMI930XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405017153626,"sku":"BWCS-SMI930XL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMI930XL-1.webp?v=1779369859","url":"https:\/\/batteryweb.com\/products\/telstra-gt-i9300t-replacement-battery-38v-2100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}