{"product_id":"lenovo-thinkpad-x220-replacement-battery-111v-6600mah-li-ion","title":"Lenovo ThinkPad X220 Replacement Battery 11.1V 6600mAh 0A36307","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo ThinkPad X220 \/ X230 Series — 11.1V Li-ion Replacement Battery (0A36307)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.1V 6600mAh (73.26Wh) lithium-ion battery replaces the original pack in the ThinkPad X220, X220i, X220s, and X230. It fits the standard 9-cell bay and uses the same connector and BMS handshake as the factory unit. Cross-references include 45N1022, 45N1023, 45N1024, and 45N1025.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eX220 and X230 platform compatibility:\u003c\/strong\u003e\n    These four models share the same voltage rail, physical bay dimensions, and SMBus BMS protocol. The X230 uses the same connector pinout as the X220, so one pack covers the full chassis generation without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack on a ThinkPad X220 and monitored BMS communication via HWMonitor. The protection circuit tripped correctly at low-voltage cutoff and the SMBus returned accurate state-of-charge data within two full cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on ThinkPad X220:\u003c\/strong\u003e\n    After installing, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the firmware flags after every cell swap.\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 replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLenovo's Power Manager reads cycle count and wear data stored in the battery's EEPROM. A new cell ships with zeroed or mismatched EEPROM values, which the BIOS interprets as a degraded pack. This is a firmware read issue, not a fault with the replacement cell. Run the full discharge-to-hibernate then uninterrupted charge sequence once — Power Manager updates its health assessment after the learn cycle completes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down hard at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on the ThinkPad mainboard calibrates its discharge curve against the old cell's chemistry profile. With a new cell, the stored curve is wrong — the gauge shows 25% while actual cell voltage has already dropped below the load threshold. Under combined CPU and display draw, the pack hits voltage cliff before the gauge catches up. After two to three full discharge and charge cycles, the fuel gauge IC re-maps the curve against the new cell and the shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409812127834,"sku":"BWCS-IBX220HB-1","price":121.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409812160602,"sku":"BWCS-IBX220HB-2","price":139.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409812193370,"sku":"BWCS-IBX220HB-3","price":152.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IBX220HB-1.webp?v=1779581043","url":"https:\/\/batteryweb.com\/products\/lenovo-thinkpad-x220-replacement-battery-111v-6600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}