{"product_id":"fly-iq446-replacement-battery-37v-2300mah-li-polymer","title":"BL-G021A Fly IQ446 Compatible Battery 3.7V 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFly IQ446 \/ Elegance 2 — 3.7V Li-Polymer Replacement Battery (BL-G021A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2300mAh lithium-polymer cell replacing the OEM BL-G021A battery in the Fly IQ446 and Elegance 2 smartphones. It fits the internal bay directly and connects via the original flex connector. Capacity is 8.51Wh — matching the stock specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIQ446 and Elegance 2 compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The BL-G021A reference covers both variants — no hardware modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge passes on an IQ446 unit. The BMS accepted the cell without fault flags, and the charge IC stepped through CC\/CV phases normally with no thermal interruption.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable any fast-charge mode and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes into an uncalibrated state.\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 Fly IQ446 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity fault. A fresh Li-Polymer cell has a steeper voltage drop at lower states of charge than a worn cell. The phone's modem and display draw a combined spike that pushes the cell voltage below the BMS cutoff threshold — typically 3.0V — before the fuel gauge reaches zero. It looks like the battery drained instantly, but the cell simply cannot sustain voltage under that momentary load. One full discharge-charge cycle recalibrates the coulomb counter and shifts the OS shutdown curve to match the new cell's actual voltage profile.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge in storage. If the replacement cell dropped below approximately 2.5V per cell during storage, the BMS enters a lockout state and blocks normal charging to prevent damage. The phone appears completely dead — no boot, no charge indicator. Connect the phone to a low-current USB source (500mA wall adapter, not a fast charger) and leave it for 20–30 minutes. Once the BMS detects sufficient voltage recovery, it re-initialises and normal charging resumes — confirm with a stable charge indicator on screen.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404153159770,"sku":"BWCS-GNN800SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404153192538,"sku":"BWCS-GNN800SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404153225306,"sku":"BWCS-GNN800SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GNN800SL-1.webp?v=1779369080","url":"https:\/\/batteryweb.com\/products\/fly-iq446-replacement-battery-37v-2300mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}