{"product_id":"lenovo-x390-yoga05cd-replacement-battery-1152v-4100mah-li-polymer","title":"Lenovo ThinkPad X390 Yoga 02DL021 Replacement Battery 11.52V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo ThinkPad X390 Yoga — 11.52V Li-Polymer Replacement Battery (02DL021)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.52V, 4100mAh (47.23Wh) Li-Polymer battery for the Lenovo ThinkPad X390 Yoga 2-in-1 convertible notebook. It replaces OEM part numbers including 02DL021, L18L3P72, L18M3P72, SB10K97659, and related variants. It fits X390 Yoga units across the 05CD, 08CD, and 20NNA007CD build codes.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eX390 Yoga platform compatibility:\u003c\/strong\u003e\n    All ThinkPad X390 Yoga variants share the same 11.52V three-cell Li-Polymer architecture, connector pinout, and BMS handshake protocol. The OEM part numbers L18L3P72, L18M3P72, and L18S3P72 are functionally interchangeable across this platform — they reflect firmware revisions, not different cells.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a ThinkPad X390 Yoga under mixed CPU and display load. The BMS communicated correctly over SMBus, charge current stepped down properly at the 80% threshold, and cell voltage held within spec under sustained load without triggering a protective cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle reset after install:\u003c\/strong\u003e\n    After fitting this battery, discharge the laptop to hibernate cutoff — not just sleep — then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to recalibrate against the new cell 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 battery health as poor immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ThinkPad BIOS reads health data from EEPROM embedded in the battery pack. A new cell carries fresh EEPROM data that doesn't match the charge history stored from the old pack, so the firmware flags it as degraded on the first boot. This is a firmware calibration issue, not a cell defect. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% — the BIOS battery learn cycle will rewrite its baseline and the poor health warning will clear.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't yet calibrated against the new cell's actual voltage curve. The percentage displayed is calculated from old charge-cycle data, so the reported figure doesn't match the real remaining cell voltage. Under full CPU plus display load, voltage drops sharply — the cell hits the BMS cutoff floor while the OS still shows 20–30% remaining. Complete two to three full discharge-to-hibernate and charge-to-100% cycles. After that, the fuel gauge IC recalibrates and the shutdown threshold aligns with the actual cell floor, which on this pack sits at approximately 9.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409620172890,"sku":"BWCS-LVT390NB-1","price":93.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409620205658,"sku":"BWCS-LVT390NB-2","price":106.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409620238426,"sku":"BWCS-LVT390NB-3","price":116.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVT390NB-1.webp?v=1779580234","url":"https:\/\/batteryweb.com\/products\/lenovo-x390-yoga05cd-replacement-battery-1152v-4100mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}