I'm set on getting a 32gb iPad wifi. I was wondering what accessories I should get with it. At times I will tether my iPhone so I thought of getting 2 of these battery pack to ensure my iPhone still has a juice when I want to make a call. I already have the Otter box defender case do you know if the battery pack will fit on my phone even with the case on? Then I was thinking of getting a smart cover or a knock like this one do you know if it folds and sets the ipad to sleep like the smart cover? Should I get a sleeve as well? are there any other accessories I should get? I'd like to get them from amazon because if I get the battery packs I'm below the 25$ free shipping.