Valuable and difficult.

I know not in what movie that was when the father said to his son "is difficult, if so legs away then isses expensive"
This is precisely the impression I got of this battery. Only that it is not expensive, but looks and feels like. The material is like a full metal jacket made of aluminum?!? It looks very stable. And when it does a lot of it has probably also be difficult. What I like about this battery shape is that you can hold it like a sandwich with the phone in your hand or phone, without that it is cumbersome. For performance, I can only say what in my US trip, when I use the battery charger to night then during the day to charge our cell phones in the car with them. So I just need a socket with US adapter.