{"product_id":"bea-fon-sl860-touch-replacement-battery-37v-1450mah-li-ion","title":"SL860 Touch Compatible Battery 3.7V 1450mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBea-fon SL860 Touch — 3.7V Li-ion Replacement Battery (SL860)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V Li-ion cell rated at 1450mAh (5.37Wh), built to fit the Bea-fon SL860 Touch and SL860_EU001B. It replaces the original cell when the phone no longer holds charge through a normal day of calls and texts. Dimensions are 64.80 x 44.00 x 5.20mm — check these against your original before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSL860 Touch and SL860_EU001B compatibility:\u003c\/strong\u003e\n    Both variants use the same battery bay dimensions, connector pinout, and 3.7V nominal voltage rail, so one cell covers both. No adapter or wiring change needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled the cell through full charge and discharge on the SL860 platform and logged BMS cutoff behaviour at both ends — low-voltage lockout triggers cleanly at the cell floor, and charge termination cuts correctly at full capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first installation, disable any fast-charge mode and run one complete discharge down to automatic shutdown, then charge fully to 100%. This gives the fuel gauge IC a clean reference curve against the new cell before high-current charging is applied to 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 SL860 Touch reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe SL860 Touch uses a fuel gauge IC that builds its charge model around the discharge curve of the original cell. When a new cell goes in, the IC is still reading against the old curve, so reported percentage drifts from actual state of charge. You may see the phone jump from 40% to 15% in minutes, or sit at 1% and keep running. One full discharge-to-shutdown followed by an uninterrupted charge to 100% resets the coulomb counter against the new cell's actual curve. After that cycle, percentage tracking stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on a replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity issue. Under modem load — during a call or a data burst — the cell voltage sags sharply, and the BMS trips the output before the fuel gauge registers low charge. It happens most often in the first few cycles on a new cell before the internal resistance settles. If shutdowns persist past the third full cycle, confirm the cell is seated flat with no connector flex. A resting open-circuit voltage of 3.85V or above after a full charge confirms the cell itself is not at fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391782977626,"sku":"BWCS-BEL860SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391783010394,"sku":"BWCS-BEL860SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391783043162,"sku":"BWCS-BEL860SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BEL860SL-1.webp?v=1779141908","url":"https:\/\/batteryweb.com\/products\/bea-fon-sl860-touch-replacement-battery-37v-1450mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}