I have only had this charger for a few weeks, however in that time it has already saved me many times. As a business person, I'm on the phone a lot, and on each occasion, recently, I have been in the middle of important meetings that would normally tie me down to my desk or car, due to running out of power. With the iFuel I have been able to not be tethered and instead able to continue running errands. I really suggest this product, if you are in need of additional power without wanting to add continuous bulk to your phone with a battery case. It can easily remain in my pocket while walking around.