The last thing you want when coming back to your tablet is a dead battery. Battery life: You probably don’t carry your tablet with you everywhere, as you do your phone, so it can be easy to forget to plug your tablet in.Watching video is one of the most common uses for a tablet, and no one wants to be staring at a dingy, low-res screen while they binge on Netflix. Display: A good tablet must have a high-resolution screen with a wide brightness range.