{"product_id":"dell-xcd28-replacement-battery-37v-800mah-li-ion","title":"Dell XCD28 Replacement Battery 3.7V 800mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell XCD28 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 800mAh Li-ion cell for the Dell XCD28 smartphone. It replaces the original battery when the phone no longer holds charge, shuts down unexpectedly, or fails to power on. Capacity is 800mAh (2.96Wh), matching the stock cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXCD28 fit:\u003c\/strong\u003e\n    The XCD28 uses a compact 3.7V single-cell Li-ion pack at 54.54 × 33.69 × 5.26mm. That exact footprint and voltage rail is what the phone's charge IC and fuel gauge IC expect. Any deviation in cell size or voltage triggers fit or calibration issues.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on the bench. The BMS accepted charge without tripping cutoff, and the protection circuit responded correctly to simulated over-discharge conditions at the low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first install, disable fast charging if available and run one complete discharge-charge cycle. This gives the XCD28's fuel gauge IC a full sweep of the new cell's discharge curve before it locks in its percentage calculations.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the XCD28 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe XCD28's fuel gauge IC learns the discharge curve of whichever cell it last fully cycled. When you swap in a new cell, the IC is still referencing the old curve. This causes the percentage readout to jump, stall, or report full charge when the cell is not. One complete discharge to near-empty followed by a full uninterrupted charge resets the coulomb counter and brings the readout back in line with actual cell state.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the XCD28 after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the phone's minimum operating threshold under load — typically during screen-on or active data use — even though the fuel gauge still shows charge remaining. The root cause is an uncalibrated fuel gauge reading a voltage cliff on the new cell incorrectly. Run one full discharge-charge cycle without interruption. After calibration, the shutdown threshold and percentage display should align at approximately 3.4–3.5V under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405081608282,"sku":"BWCS-ZTX850SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405081641050,"sku":"BWCS-ZTX850SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405081673818,"sku":"BWCS-ZTX850SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTX850SL-1.webp?v=1779369935","url":"https:\/\/batteryweb.com\/products\/dell-xcd28-replacement-battery-37v-800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}