{"product_id":"sprint-evo-shift-4g-replacement-battery-37v-1200mah-li-ion","title":"Sprint EVO Shift 4G 35H00146-00M Compatible Battery 3.7V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSprint EVO Shift 4G — 3.7V Li-ion Replacement Battery (35H00146-00M)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1200mAh Li-ion replacement battery for the Sprint EVO Shift 4G smartphone. It matches the OEM part number 35H00146-00M and fits the original battery bay without modification. Rated at 4.44Wh, it restores power to the EVO Shift 4G's processor, display, radio, and camera systems.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEVO Shift 4G fit:\u003c\/strong\u003e\n    The EVO Shift 4G uses the 35H00146-00M cell with a specific connector pinout and BMS communication line that coordinates with HTC's charge IC. This replacement matches that pinout and BMS protocol so the phone recognises the cell and accepts a charge normally.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge and load cycle on the EVO Shift 4G platform. The BMS handshake completed on first insertion, the charge IC accepted current without fault flags, and cell voltage held steady under sustained screen-on and radio load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing this battery, run one complete discharge down to auto-shutoff, then charge uninterrupted to 100% before normal use. This gives the phone's fuel gauge IC a full reference curve for the new cell so percentage readings stay accurate from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the EVO Shift 4G reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe EVO Shift 4G uses a coulomb-counting fuel gauge IC that builds its capacity model from the previous cell's charge and discharge history. When you swap in a new cell, that stored model no longer matches the actual discharge curve of the replacement. The phone continues reading percentage against the old curve, which causes the display to jump, stall, or report 0% while the cell still holds usable voltage. One complete discharge-charge cycle resets the reference data and brings the percentage display back in line with real cell state.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the modem or display pulls a high current burst and the cell voltage drops sharply under load — crossing the BMS undervoltage threshold even though the percentage display still reads high. It is a calibration problem, not a defective cell. The fuel gauge IC has not yet mapped where the new cell's voltage cliff sits under real load conditions. Run one full discharge to auto-shutoff followed by an uninterrupted charge to 100%, and the IC recalibrates its cutoff point against the actual cell voltage curve — shutdowns at 20–30% typically stop after that first full cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405095600218,"sku":"BWCS-HT6100SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405095632986,"sku":"BWCS-HT6100SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405095665754,"sku":"BWCS-HT6100SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HT6100SL-1.webp?v=1779369956","url":"https:\/\/batteryweb.com\/products\/sprint-evo-shift-4g-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}