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Record Breaker: Lenovo ThinkPad X220 Lasts Over 20 Hours | Laptop Mag
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Lenovo ThinkPad X220 Review
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Lenovo ThinkPad X220 review: Lenovo ThinkPad X220 - CNET
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Lenovo ThinkPad X220 and X220 convertible tablet official, 24 hours of battery life promised | Engadget
Lenovo Unboxed: ThinkPad X220t tablet - YouTube
