2)Charge & Operation Times-When your at the airport waiting for a flight, you know it's the best time to read or jump on the airport's wifi signal and surf, read, facebook or whatever your fancy is while you're waiting. And with most android tablets for sale ranging from 5-10 hours, you won't have an issue with android 2.2 tablets using this your entire travel times from getting onto the plane to getting off. The most powerful 7 inch android tablets that has the longest run time is the Viewsonic G 10 inch android tablets Internet Tablet providing up to 10 hours.