{"product_id":"boostmobile-transform-ultra-replacement-battery-37v-1200mah-li-ion","title":"BoostMobile Transform Ultra Replacement Battery 3.7V 1200mAh EB484659VA","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBoostMobile Transform Ultra \/ SPH-M930 — 3.7V Li-ion Replacement Battery (EB484659VA)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1200mAh Li-ion replacement battery for the BoostMobile Transform Ultra (SPH-M930) smartphone. It slots directly into the battery bay and restores power to calls, messaging, and apps. Capacity is sourced from product data at 4.44Wh — match the OEM part number EB484659VA before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTransform Ultra \/ SPH-M930 fitment:\u003c\/strong\u003e\n    Both model names reference the same hardware platform. They share an identical battery bay, connector pitch, and BMS handshake protocol — one cell covers both designations.\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 SPH-M930 platform. The BMS accepted the new cell without fault codes, and charge termination triggered correctly at full voltage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, run one full discharge-to-charge cycle with fast charging disabled. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.\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 Transform Ultra after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC on the SPH-M930 is still running a discharge curve calibrated to the old, degraded cell. The new cell has a steeper voltage cliff under modem and screen load than the IC expects. The phone reads 25% but the actual cell voltage has already dropped below the shutdown threshold. One full discharge-charge cycle without fast charging lets the coulomb counter reset against the new cell's real capacity curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not powering on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage. If the cell voltage drops below roughly 2.5V, the BMS enters lockout to prevent damage and will not pass current to the phone. The phone shows nothing — no boot screen, no charge indicator. Connect the charger and leave it for 15–30 minutes without pressing power; the charge IC needs to trickle current into the cell above the BMS re-initialisation threshold before normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405077446746,"sku":"BWCS-SMT759SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405077479514,"sku":"BWCS-SMT759SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405077512282,"sku":"BWCS-SMT759SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMT759SL-1.webp?v=1779369935","url":"https:\/\/batteryweb.com\/products\/boostmobile-transform-ultra-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}