Maxboost Hybrid iPhone 4S Battery Case / iPhone 4 Battery Case (1900mAH, Fits all versions of Apple iPhone 4 & 4S) - Detachable Battery Charger Case External Rechargeable Battery Pack Charging Power Case

Not only did the product arrive used (there are scratch marks on the outside and greasy fingerprints on the inside), the color was not what is pictured, which is black. The product I received is white, which would be my last choice in colors. Whether the product works well (since it's used) remains to be seen. I would not buy from power-innovation again.

Excellent product, it practically doubles the IPhone battery; fits perfectly but a bit bulky.

So I think I've given this enough time to say it definitely works. It does make your phone bulky but I've used an otterbox for as long as I've owned a smart phone so this doesn't bother me. I did add a screen protector to my phone. So far it's definitely added the battery life and on a long road trip it's been extra helpful. It's also a bit heavy.

This case is great.I'm very happy with how well it fits and charging in the case is easy and long lasting.I really am happy that when the phone was accidentally knocked off the table it suffered no damage and the case is still intact.I would definitely recommend this to anyone looking for one.

I love the Max boost case. It holds a great charge. My iPhone is normally at about 10% battery by 4 and the max boost case charges it up so I'm good to go till bed time. I recommend this to everyone!!!

Love this case! Very sturdy product. Highly recommend.

Well worth buying. This case added hours of time tk husbands phone who works for the railroad and can be on a train 12 hours plus without access to a charger. Highly recommend it

Awesome