{"product_id":"lenovo-a500-replacement-battery-111v-3800mah-li-ion","title":"Lenovo A500 BATDAT20 Replacement Battery 11.1V 3800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo A500 \/ E680 Series — 11.1V Li-ion Replacement Battery (BATDAT20)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 3800mAh (42.18Wh) Li-ion battery that replaces the OEM BATDAT20 cell. It fits the Lenovo A500, E600, E660, and E680 notebooks. The connector and BMS handshake match the original, so the system recognises it on first boot.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA500 \/ E600 \/ E660 \/ E680 platform fit:\u003c\/strong\u003e\n    These four models share the same 11.1V battery bay, connector pinout, and BMS communication protocol. One cell covers all four without adapter or modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on an E680 unit. The BMS negotiated correctly, the fuel gauge IC registered the new cell, and charge reached 100% without interruption.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap discharge cycle on first use:\u003c\/strong\u003e\n    After installing, run the laptop on battery until it hibernates at low charge, then charge uninterrupted to 100%. This triggers the BIOS battery learn cycle and clears the inaccurate health warning that appears after any cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health after swapping the BATDAT20 cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Lenovo BIOS reads health data stored in the battery's EEPROM, not live cell voltage. When a new cell arrives, that EEPROM data either reads as unfamiliar or shows degraded values from the manufacturing default. The system logs a health warning until the learn cycle resets the stored parameters. One full discharge-to-hibernate followed by a full charge resolves this on the A500 and E-series platforms.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% shown on the fuel gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC still holds calibration data from the old, degraded cell. Under combined CPU and display load, the new cell's actual voltage curve doesn't match the stored model, so the gauge misreads remaining capacity. The system hits its low-voltage cutoff well before the displayed percentage reaches zero. Two to three full discharge-to-hibernate and full-charge cycles recalibrate the gauge — check that the cutoff voltage at hibernate is no lower than 9.0V across the pack.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409804689498,"sku":"BWCS-LVE680NB-1","price":88.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43409804722266,"sku":"BWCS-LVE680NB-2","price":104.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43409804755034,"sku":"BWCS-LVE680NB-3","price":115.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVE680NB-1.webp?v=1779580993","url":"https:\/\/batteryweb.com\/products\/lenovo-a500-replacement-battery-111v-3800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}