{"product_id":"lg-ke770-replacement-battery-37v-550mah-li-ion","title":"LGIP-410A Replacement Battery for LG KE770 3.7V 550mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLG KE770 \/ KF510 Series — 3.7V Li-ion Replacement Battery (LGIP-410A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 550mAh Li-ion replacement cell for the LG KE770 flip phone and related models including the KG289, 278A, and KF510. It slots into the original battery bay and uses the same three-contact connector as the LGIP-410A. Capacity is 550mAh — identical to the factory spec.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKE770 \/ KG289 \/ KF510 platform fit:\u003c\/strong\u003e\n    These models share the same battery bay dimensions, 3.7V voltage rail, and three-pin connector layout. One cell covers the full group without adapter or modification.\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 on the KE770 platform. The BMS accepted charge current immediately on first insertion, and protection circuits triggered correctly at low-voltage cutoff without requiring a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first install:\u003c\/strong\u003e\n    After fitting this cell, run one complete discharge down to auto-shutdown, then charge uninterrupted to 100%. The phone's fuel gauge IC was calibrated to the old cell's discharge curve — skipping this step causes the percentage indicator 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 KE770 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe KE770 uses a basic fuel gauge IC that tracks capacity by mapping voltage against a stored discharge curve from the original cell. A new cell has a slightly different internal resistance and discharge profile, so the stored curve no longer matches. The phone reads voltage correctly but converts it to the wrong percentage. One full discharge-to-shutdown followed by a complete uninterrupted charge resets the reference points the IC uses for future reads.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops sharply under the load spike from an outgoing call or backlight burst — a voltage cliff that the fuel gauge doesn't predict from the resting voltage. It's more common on a new cell before the fuel gauge IC has completed its first calibration cycle. Run the phone down to auto-shutdown once rather than topping up from 50%. After that first full cycle, the IC recalculates the cliff point and shutdown warnings appear at the correct percentage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405257670746,"sku":"BWCS-LKE770SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405257703514,"sku":"BWCS-LKE770SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405257736282,"sku":"BWCS-LKE770SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LKE770SL-1.webp?v=1779370369","url":"https:\/\/batteryweb.com\/products\/lg-ke770-replacement-battery-37v-550mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}