{"product_id":"emporia-flipbasic-replacement-battery-37v-1150mah-li-ion","title":"Emporia FLIPbasic AK-F220 Replacement Battery 3.7V 1150mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEmporia FLIPbasic — 3.7V Li-ion Replacement Battery (AK-F220)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1150mAh Li-ion battery for the Emporia FLIPbasic (F220) flip phone. It replaces the original AK-F220 cell when the battery no longer holds adequate charge for daily calls and standby use. Fits the FLIPbasic and FLIP basic model variants.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFLIPbasic \/ F220 fitment:\u003c\/strong\u003e\n    The FLIPbasic, FLIP basic, and F220 all use the same AK-F220 cell format — same voltage rail, same connector pinout, and the same BMS handshake with the phone's charge IC. One replacement covers all three model names.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on the F220 platform and confirmed the BMS communicates correctly with the charge IC — charge acceptance was normal, and the protection circuit triggered correctly at both low-voltage and overcurrent thresholds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge down to phone shutdown, then charge uninterrupted to 100% before normal use. This lets the fuel gauge IC map its calibration to the new cell's discharge curve and prevents erratic percentage readings in the first few days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the FLIPbasic reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe FLIPbasic uses a fuel gauge IC that tracks capacity by counting coulombs against a stored discharge curve. When the original degraded cell is replaced, that stored curve no longer matches the new cell's characteristics. The IC keeps reading against old data, so percentages display incorrectly — often jumping or freezing at certain points. One full discharge-charge cycle resets the reference and brings the gauge back into alignment with the actual 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 yet calibrated to the new cell's voltage-to-capacity curve. A fresh cell has a steeper voltage cliff than a worn one — the phone's low-voltage cutoff triggers before the gauge catches up and displays 0%. The fix is the same recalibration cycle: discharge to auto-shutdown, then charge to 100% without interruption. After one complete cycle, shutdowns at falsely-high percentages stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404268339290,"sku":"BWCS-EAF220SL-1","price":16.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404268372058,"sku":"BWCS-EAF220SL-2","price":17.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404268404826,"sku":"BWCS-EAF220SL-3","price":17.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EAF220SL-1.webp?v=1779369510","url":"https:\/\/batteryweb.com\/products\/emporia-flipbasic-replacement-battery-37v-1150mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}