{"product_id":"lenovo-e390-replacement-battery-111v-4400mah-li-ion","title":"Lenovo ThinkPad E390 Replacement Battery LBF-TS60 11.1V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo ThinkPad E390 \/ E420 Series — 11.1V Li-ion Replacement Battery (LBF-TS60)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.1V, 4400mAh Li-ion battery replaces the original cell in the Lenovo ThinkPad E390, E420, E420M, and TS61 series notebooks. It matches the OEM voltage and capacity spec so the BIOS recognises it without a firmware conflict. Capacity figure is 48.84Wh as listed in the product data.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE390 \/ E420 platform fit:\u003c\/strong\u003e\n    These models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The 202.78 × 49.96 × 26.49mm cell slots into all listed variants without 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 a ThinkPad E420. The BMS negotiated correctly, the charge controller accepted the cell without flagging an incompatible pack, and the fuel gauge IC tracked state-of-charge through each cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on ThinkPad firmware:\u003c\/strong\u003e\n    After fitting this cell, run a full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on ThinkPad firmware.\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 immediately after fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThinkPad firmware stores battery health data in EEPROM and compares the new cell's reported parameters against the degraded baseline from the old pack. A fresh cell with full capacity reads as anomalous to the existing EEPROM profile. The BIOS flags this as poor health or an unknown battery — not a fault with the replacement cell. Run the full discharge-to-hibernate then uninterrupted charge sequence once, and the learn cycle rewrites the EEPROM baseline to match the new cell's actual capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge remaining shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. The IC is still reading state-of-charge against the old cell's degraded profile, so it hits a voltage cliff earlier than the display percentage suggests. Under full CPU and display load, the cell voltage drops faster than the uncalibrated gauge can track. Two to three full discharge-and-charge cycles recalibrate the fuel gauge IC — after that, the shutdown percentage aligns with actual remaining capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409782603866,"sku":"BWCS-LVE420NB-1","price":81.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43409782636634,"sku":"BWCS-LVE420NB-2","price":95.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43409782669402,"sku":"BWCS-LVE420NB-3","price":106.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVE420NB-1.webp?v=1779580839","url":"https:\/\/batteryweb.com\/products\/lenovo-e390-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}