Google unveils new Nexus 7, Internet TV device

Google is betting consumers will pay slightly more for a sleeker, more powerful version of its Nexus 7 tablet as the Internet company escalates its rivalry with Apple and Amazon.com in technology's key battleground — the mobile computing market.

The fancier devices unveiled Wednesday in San Francisco will go on sale in the U.S next Tuesday in Google's online store and numerous retailers with brick-and-mortar stores.

Among other things, the souped-up line of Nexus tablets will boast a higher-definition 7-inch display screen and a processor that promises to be nearly as twice as fast. Dual stereo speakers have been added for richer sound, and the device's battery duration has been extended to 10 hours for Web browsing, an increase of about an hour.

On other fronts, Google Inc. also unveiled a gadget that will lean on its widely used Chrome Web browser and take aim at Apple on another front — the living room.

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