Hardly at all because the battery life sucks so much. I use it a lot in the car and at the gym/running for playing music but I rarely use it for anything other than a cursory glance at my emails or FB.
My iPad on the other hand..........
Since I switched to ios7 the battery life is shocking. bubhub app in particular. I have a charger in the car and carry one in my handbag lol.
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