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Lenovo ThinkPad X1 Carbon Battery for 2nd Generation models Type 20A7 and 20A8 Battery # 45N1700 45N1701
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Lenovo ThinkPad X1 Carbon 3rd Generation Disassembly Battery Replacement Repair Quick Look Inside - YouTube
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Amazon.com: LeFix CMOS RTC BIOS Battery CR1632 Compatible with Lenovo Thinkpad X230s,X240s,X240,Yoga Laptop,X250, Yoga 12, X260, X270,X1 Carbon 1st Gen(Type 34xx)| A275, A475|T480,A485 : Electronics
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