{"product_id":"navon-bt60-replacement-battery-37v-1200mah-li-ion","title":"Navon BT60 Li-ion Replacement Battery 3.7V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNavon BT60 — 3.7V Li-ion Replacement Battery (BT60)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1200mAh Li-ion replacement battery for Navon smartphones that use the BT60 cell. It measures 53.00 × 33.90 × 5.70mm and matches the original form factor. Fit it when the original battery no longer holds charge or fails to power the handset.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBT60 platform fit:\u003c\/strong\u003e\n    Navon handsets in this range share the same battery bay dimensions, connector orientation, and 3.7V nominal voltage rail. The BT60 designation covers both the OEM part number and the fit model, so one cell serves the full compatible lineup without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a compatible handset, confirming the BMS accepted the cell, charge termination triggered correctly at 4.2V, and no overcurrent fault tripped on boot or during modem wake events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting, disable fast charging if available and run one complete discharge down to auto-shutoff, then charge uninterrupted to 100%. This gives the fuel gauge IC a clean reference curve for the new cell before it starts tracking coulombs under load.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Navon phone reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC stores a learned discharge curve from the old cell. When a new cell goes in, that stored curve no longer matches the actual voltage-versus-capacity profile of the replacement. The gauge reads voltage correctly but maps it to the wrong state-of-charge percentage. One full discharge-to-shutoff followed by a full charge resets the coulomb counter and forces the IC to re-anchor its curve to the new cell's actual endpoints.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell hits a voltage cliff under modem or display load before the fuel gauge predicts empty. At high current draw, internal resistance causes a rapid voltage drop that trips the BMS undervoltage cutoff — even while the reported percentage still looks safe. The fuel gauge IC hasn't yet mapped where that cliff sits on the new cell. Running two full discharge-charge cycles after fitting closes the gap; after recalibration, shutoffs should move down to below 5% reported charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404142772314,"sku":"BWCS-AVC120SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404142805082,"sku":"BWCS-AVC120SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404142837850,"sku":"BWCS-AVC120SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AVC120SL-1.webp?v=1779369080","url":"https:\/\/batteryweb.com\/products\/navon-bt60-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}