Rechargeable 1900mAh External Power Battery Back Case for iPhone 4 / 4S - Purple

Pros: The weight isn't higher than the original iphone's, so you don't hardly notice anything else. The cover is very soft and pleasant. The connection between the two parts of the case is smooth so you won't have any problem to plug and unplug the phone if you don't like to maintain it everyday in the case.

Cons: Sometimes it doesn't connect well to the phone but it's not important.

Other: Good choice if you need to travel and you won't reach a normal plug in a while.

Pros: - Easy to put, to use and to take off. - Comes in a great package, it makes the case looks alot more expensive than it is. - There's a users manual inside the box and it tells you all the better ways to use it. - Do you really need more? IT CHARGES YOUR FREAKING PHONE! AND IT'S P-U-R-P-L-E!!!!

Cons: I can see just one: it just comes with an data cable, you can't charge it on a wall socket, just on your computer, and that's a little undesirable since you have to turn the computer on every time you need to charge the external battery.

Other: That's the best product I bought until now from DealExtreme. Get one now!