{"product_id":"blackberry-8800-replacement-battery-37v-1900mah-li-ion","title":"BlackBerry C-X2 Replacement Battery 3.7V 1900mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBlackBerry 8800 Series — 3.7V Li-ion Replacement Battery (C-X2 \/ BAT-11005-001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1900mAh Li-ion replacement battery for the BlackBerry 8800, 8800c, 8800r, and 8820. It uses OEM part numbers C-X2, BAT-11005-001, and ASY-14321-001. Swap it in when the original cell no longer holds a useful charge through a working day.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e8800 series compatibility:\u003c\/strong\u003e\n    The 8800, 8800c, 8800r, and 8820 all share the same battery bay dimensions, connector pinout, and 3.7V charging rail. One cell fits the entire group — no hardware modification needed.\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 8800 platform. The BMS accepted the charge IC handshake without fault codes, and voltage held steady above 3.5V under combined radio and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing this cell, disable any fast-charge accessory and run one full discharge-to-charge cycle before normal use. This lets the fuel gauge IC map its coulomb counter against the new cell's discharge curve before high-current charging begins on 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\"\u003eWhy the BlackBerry 8800 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe 8800 uses a fuel gauge IC that builds its percentage estimate from a stored discharge curve tied to the old cell. When you fit a new cell, that stored curve no longer matches actual cell behaviour. The IC will overestimate or underestimate remaining charge until it collects real data. One full discharge from 100% down to automatic shutdown, followed by a complete 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 cell voltage drops below the BMS cutoff threshold under combined modem and screen load — even though the percentage display still reads 20–30%. The fuel gauge IC has not yet calibrated its low-voltage cliff for the new cell, so it does not flag the impending cutoff in time. The BMS trips at approximately 3.0V per cell to protect the chemistry, and the phone shuts down instantly. Complete that first full discharge-charge cycle and the gauge IC will start predicting the voltage cliff accurately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409471144026,"sku":"BWCS-BR8800XL-1","price":27.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43409471176794,"sku":"BWCS-BR8800XL-2","price":30.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43409471209562,"sku":"BWCS-BR8800XL-3","price":33.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BR8800XL-big.webp?v=1779579784","url":"https:\/\/batteryweb.com\/products\/blackberry-8800-replacement-battery-37v-1900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}