{"product_id":"wiko-lenny-2-replacement-battery-37v-1800mah-li-ion","title":"Wiko LENNY 2 Replacement Battery 3.7V 1800mAh 5030","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWiko LENNY 2 \/ Lenny 3 — 3.7V Li-ion Replacement Battery (5030)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1800mAh Li-ion cell built to fit the Wiko LENNY 2 and Lenny 3 smartphones. It replaces OEM part number 5030 and slots into the original battery bay using the same connector and physical footprint. Capacity is 1800mAh (6.66Wh) — taken from the product specification, not estimated.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLENNY 2 and Lenny 3 compatibility:\u003c\/strong\u003e\n    Both models run the same 3.7V battery rail, share the same connector pinout, and use the same physical cavity dimensions. One cell covers both devices 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 full charge and discharge on the LENNY 2 platform. The BMS accepted the cell, charge termination triggered correctly at 4.2V, and protection cutoff engaged cleanly at the low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge down to auto-shutdown, then charge to 100% without interruption. The LENNY 2 fuel gauge IC calibrates its coulomb counter against a complete discharge curve — skipping this step causes the OS to report inaccurate percentages for days.\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 LENNY 2 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC still holds the discharge curve of the old, degraded cell. The new cell has a steeper voltage drop near depletion, and the phone hits the hardware low-voltage cutoff before the OS percentage reaches zero. The modem and screen together can pull enough current to collapse cell voltage below 3.2V in under a second — faster than the gauge can track. One complete discharge-to-shutdown followed by a full charge corrects the stored curve and stops the early cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone shows 100% immediately after charging begins on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh high-impedance cell reads a resting voltage close to 4.0V straight out of packaging. The LENNY 2 fuel gauge maps that open-circuit voltage to a high state-of-charge estimate before any real charging current flows. The displayed percentage is not accurate — it reflects the resting voltage, not actual stored energy. Charge the phone to full, let it discharge naturally to shutdown, then charge again to 100% to anchor the gauge to real capacity endpoints.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404144771162,"sku":"BWCS-WKL028SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404144803930,"sku":"BWCS-WKL028SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404144836698,"sku":"BWCS-WKL028SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WKL028SL-1.webp?v=1779369095","url":"https:\/\/batteryweb.com\/products\/wiko-lenny-2-replacement-battery-37v-1800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}