Lenovo X220 claims 24-hour battery life

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Lenovo's just updated the X200 series, Cory's main machine, and the reviews are looking good. Here's PC Magazine's Cisco Cheng:

An improved keyboard, made up of larger keys, is made possible by widening what is now a 12.5-inch widescreen, yet the X220 is even lighter than its predecessor, the Lenovo ThinkPad X201 ($1,625 direct, 4 stars). Factor in the new Intel Core i5 i5-2520M CPU, basedon Intel's Sandy Bridge platform (now known as second-generation Core processors) and fantastic battery life and the ThinkPad X220 easily earns an Editor's Choice in the business ultraportable category.

Most interesting is the claimed 24-hour battery life, accomplished with a snap-on extra battery. The standard 6-cell alone got 8 hours 40 minutes in testing.