A good life extending case, which is good for travel or heavy use occasions. Gets a little hot, and is a little bulky but it keeps the phone very well protected. (Posted on 8/23/12)

Works like a charm. Made a drop that should have destroyed my phone but not even a scratch! Good thing I bought this with the extended battery! (Posted on 8/21/12)

This is a good thin case. I was looking for a more durable item than gel silicone but not a thicker Otter style case and this is the trick. The case has one extra cut out that is for a stylus pen. The charger cable needs to be pushed in slightly more than without it to get it but does fit into the slot they cut for it. Nice little case. (Posted on 8/16/12)

I bought this after looking at all the other battery cases for the S III. At the time it was offered for $40.

Operation:
This case will charge the battery, but there's no real way to verify the capacity. I tested it by letting my phone battery drop to 39% and then activated the battery case which was fully charged. The first thing I notices is that the battery case gets *really* hot. The external micro USB port was almost too hot to touch while the case was activated. I seriously will not leave my phone unattended while it's charging. The phone was charged from 39% to 85% before the battery case was exhausted. It did this in about two hours.

Given that the stock battery is 2100 mAh, I expected the battery case's 3200 mAh battery to double the life of the phone at the very least, but in reality, it only boosts the capacity by 46%. If the battery in the case is actually 3200 mAh, I suspect most of the energy is going into heating the case up.

It's better than nothing and it will basically give me a litte boost until a higher quality solution is made available. That's the best I can say about it. (Posted on 8/7/12)