PowerBear iPhone 4S / iPhone 4 - Rechargeable Battery Case with Built in External Power Bank (3,000 mah) - Black (Up to 2X the Power) comes with Free Screen Protector (24 MONTH WARRANTY)

My phone once lasted about 8hours before going flat, with the Powerbear it now lasts at least 24hrs between charges.Only downside is that there was no charger cord with the case. Tried amazon's iPhone charger cord but it was the wrong size, had to take the battery with me to ensure the cord I bought would fit.the charger died at 7 months old, I have down graded my star rating to one due to this

Still new to me, so can't discuss longevity. What I do know is that it's trim and good looking, and seems to be durable.Sleek so it fits into my holster just as previously.During the cold, my i4S would shut down at 60% or so. Baffled!I work outside and depend on my phone for tracking, directions. Typically a few aps open at any time.Power hog.This seemed to be a cost effective fix.I'm happy. When the phone charge begins to dip, I turn on the PowerBear and top it off.Works as anticipated, better. Worth the purchase.

This is a great product and I'm sure it works like a charm, unfortunately I had to return mine as it would not charge--probably a defective battery. The product fits well in your hands and I loved the stand on the back! The color is like a mate finish and the phone literally fits in perfectly. It does not cover/protects edges as well as other covers. The switch at bottom is very sturdy and the LED notification lights are very helpful. Usually cellphones and batteries like these come half way charged upon arrival, my battery was completely depleted. I am giving 2 out of 5 just cause I got a defective unit. In my case, I opted not to get a replacement as I decided to switch phones instead.

Ordered it months ago and still working great. Protects my phone (I tend to drop it about once per month) and charges it to full capacity and then some.

It was difficult to charge the battery when attached to the phone. It was also very heavy and no protection for the front glass.

I really like the product, I hope it will prolong the life of the battery on the phone

Great extends phone use time more than I have used in 24 hrs

Simple to install. incorrect directions since my model did not have button on back to push, it had switch to slide. Worked well. When my main battery was down to 28% I switched over to back up and it was back up to 98% charge in less than an hour. A lot cheaper than a phone upgrade.