Lenovo’s IdeaPad S2 tablet is thin, light and can dock for 20 hour battery life

Lenovo has come out swinging at this year’s Consumer Electronics Show.

Along with its first TV, the Taiwanese company today also announced a revamped tablet, the IdeaPad S2, which weighs only 1.1 pounds and is one-third of an inch thick. Even better, it has a keyboard dock accessory that has a battery of its own — when connected to the dock, the tablet can have up to 20 hours of battery life, Lenovo says.

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The IdeaPad S2 comes on the heels of Asus’ popular Transformer tablets, which also sport a keyboard dock. In a sense, the IdeaPad is the Decepticon to Asus’ Transformer Prime, though it can’t compete when it comes to power since it doesn’t feature a quad-core CPU.

The 10-inch tablet instead runs a dual-core SnapDragon CPU, and it will come loaded with the Android 4.0 operating system, “Ice Cream Sandwich.” The IdeaPad S2 is slightly lighter than the iPad 2 and Asus Transformer Prime, so it may appeal for those looking for a 10-inch tablet that’s particularly portable.

Pricing and distribution for the tablet haven’t been revealed yet.