{"product_id":"sprint-evo-4g-lte-replacement-battery-38v-2000mah-li-polymer","title":"Sprint EVO 4G LTE Replacement Battery 3.8V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSprint EVO 4G LTE (APX325CWH) — 3.8V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 2000mAh lithium-polymer cell replaces the original battery in the Sprint HTC EVO 4G LTE (model APX325CWH). It fits directly into the battery compartment and connects to the same charge management circuit. Capacity is rated at 7.6Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEVO 4G LTE platform fit:\u003c\/strong\u003e\n    The EVO 4G LTE uses a fixed 3.8V Li-Polymer cell with a 3-pin connector feeding the phone's charge IC and fuel gauge IC. This replacement matches that connector pinout and nominal voltage so the BMS handshake completes without error flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the EVO 4G LTE platform. The BMS accepted the cell on the first connection, charge current stepped correctly through CC\/CV phases, and the fuel gauge IC began tracking state-of-charge without fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one full discharge-to-charge cycle before using the phone normally. This lets the fuel gauge IC build a fresh discharge curve against the new cell — skipping this step causes the percentage counter to read inaccurately for the first several cycles.\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 4G LTE reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC stores a learned discharge curve from the old cell. When a new cell goes in, that stored curve no longer matches actual cell chemistry and capacity. The IC interpolates percentage from voltage readings that now map incorrectly, so the display shows stale or compressed numbers. One full discharge below 10% followed by an uninterrupted charge to 100% forces the IC to rewrite its reference curve against the new cell.\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 fuel gauge IC hasn't completed recalibration and the phone hits a voltage cliff under load. The modem and display draw current spikes that drop cell voltage faster than the uncalibrated IC predicts. The system reads available voltage as below the shutdown threshold and cuts power even though the fuel gauge still shows charge remaining. Run the phone down to automatic shutdown once, charge fully to 100%, and the IC resets its low-voltage cutoff reference to match the new cell's actual discharge curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404339576922,"sku":"BWCS-HTX720SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404339609690,"sku":"BWCS-HTX720SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404339642458,"sku":"BWCS-HTX720SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HTX720SL-1.webp?v=1779369762","url":"https:\/\/batteryweb.com\/products\/sprint-evo-4g-lte-replacement-battery-38v-2000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}