I had a Mophie case I bought on Amazon that turned out to be counterfeit (so no warranty when it broke) so when Amazon gave me a refund (thank you) I was looking for another battery case for my iphone 4s and found this deal on the New Trent Rock rechargeable battery case. It has very good reviews so I thought I'd give it a try.
There are also other freebies you can get with this case listed below. I only got the two cases so I don't know if you can double up on any of the offers. I have no need for a stylus pen or a car charger. Two of these should outlast my iphone 4s until I upgrade to the next new iphone in a year or so.
BUY 1 GET 1 FREE! Get a FREE New Trent power rock iphone 4S/4 battery case, IMP210B when purchase the 1st one at original price. Simply add 2 or more in the cart. Enter codeat checkout.
Get a FREE $10.95 value of New Trent 15W Dual port high speed car charger, NT88C when purchase this external battery Enter codeat checkout.
Get A FREE $8.95 value New Trent Tablet Touch Screen Stylus Pen (IMP62B) when you purchase this New Trent external battery or battery case Enter codeat checkout.
GET A FREE $10.95 value New Trent Black+White 2PCS of Stylus pen when you purchase this New Trent External Battery Enter codeat checkout.
Get a Free $7.95 Value New Trent Retractable iPhone stylus Pen when purchase this battery or iPhone battery case Enter codeat checkout.
Again the link Link for New Trent Rock case on Amazon