{"product_id":"neffos-y5l-replacement-battery-38v-1800mah-li-ion","title":"NBL-46A2020 Neffos Y5L Smartphone Compatible Battery 3.8V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNeffos Y5L — 3.8V Li-ion Replacement Battery (NBL-46A2020)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 1800mAh Li-ion cell for the TP-Link Neffos Y5L smartphone. It replaces the original NBL-46A2020 when the existing battery no longer holds charge or causes unexpected shutdowns. Capacity is 6.84Wh, matching the factory specification for this handset.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eY5L fitment:\u003c\/strong\u003e\n    The Y5L uses a fixed 3.8V single-cell architecture with a direct board connector. This replacement matches that connector pinout and the BMS communication protocol the charge IC expects. No adapters, no wiring changes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, full discharge, and charge again on the Y5L board. The BMS accepted the cell without fault flags, and the fuel gauge IC tracked state-of-charge without cutoff errors on the first full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On the first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes current into 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\"\u003eSudden shutdown at 20–30% on the Neffos Y5L after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell has a slightly different discharge curve than the aged cell the fuel gauge IC was calibrated to. The OS reads 25% remaining, but the actual cell voltage under screen or modem load drops below the safe cutoff threshold, triggering an immediate shutdown. This is not a faulty battery — it is a calibration mismatch. One full discharge-charge cycle at standard rate resets the coulomb counter and resolves the early shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eY5L showing erratic or jumping battery percentage after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on the Y5L stores learned capacity data from the old, degraded cell. When a fresh 1800mAh cell goes in, the IC is still referencing those old discharge curves, so percentage readings skip or stall at certain levels. Drain the phone completely until it shuts off, then charge uninterrupted to 100% without removing the cable early. After that single calibration cycle, the percentage reading stabilises against the new cell's actual capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391986040922,"sku":"BWCS-TPY520SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391986073690,"sku":"BWCS-TPY520SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391986106458,"sku":"BWCS-TPY520SL-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TPY520SL-1.webp?v=1779142738","url":"https:\/\/batteryweb.com\/products\/neffos-y5l-replacement-battery-38v-1800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}