The really nice thing is that the larger phone batteries get the more you get to use at 50% depth of discharge. My phone is 5,000 mAh and so I get to use 2,500 mAh of it. Once average phones start getting 5,500 mAh, that will mean I will be able to use 2,750 mAh. 250mAh may not sound like a lot, but it can go a decently long way.