{"product_id":"lenovo-a2580-replacement-battery-37v-1700mah-li-polymer","title":"Lenovo A2580 Replacement Battery BL253 3.7V 1700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo A2580 \/ A2860 — 3.7V Li-Polymer Replacement Battery (BL253)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1700mAh Li-Polymer replacement battery for the Lenovo A2580 and A2860 smartphones. It carries OEM part number BL253 and slots directly into the battery bay on both handsets. Voltage and physical dimensions match the original cell: 56.00 × 48.92 × 5.28mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA2580 and A2860 compatibility:\u003c\/strong\u003e\n    Both models run the same battery bay dimensions and share the BL253 connector pinout. The charge IC on each phone expects the same 3.7V nominal rail, so one cell covers both.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through a full discharge and charge on the A2580 platform. The BMS accepted the cell without fault codes, and charge termination fired correctly at 4.2V.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    On first use, disable fast charging if available and run one full discharge down to auto-shutdown, then charge to 100% uninterrupted. This gives the fuel gauge IC a clean reference curve against the new cell before it starts reporting state-of-charge to the OS.\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 A2580 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell has a slightly different internal resistance profile than the aged cell the phone's fuel gauge IC was calibrated against. Under load spikes — modem transmit bursts or screen-on with high brightness — voltage sags faster than the IC expects, and the phone interprets that sag as a critically low state. The result is a hard shutdown even though the OS showed 20–30% remaining. One full unconditioned discharge-charge cycle resets the coulomb counter baseline and eliminates most of these early shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone shows wrong battery percentage after BL253 replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe A2580's fuel gauge IC stores a learned discharge curve from the previous cell. When a new cell goes in, that stored curve no longer matches actual cell behaviour, so reported percentage drifts — often jumping 5–10% in either direction. This is not a faulty cell; it is a calibration mismatch. Drain the phone fully until it powers off on its own, then charge to 100% in a single unbroken session. After one complete cycle the IC recalculates its curve against the new cell and percentage readings stabilise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392034046042,"sku":"BWCS-LVA258SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392034078810,"sku":"BWCS-LVA258SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392034111578,"sku":"BWCS-LVA258SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVA258SL-1.webp?v=1777949695","url":"https:\/\/batteryweb.com\/products\/lenovo-a2580-replacement-battery-37v-1700mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}