I have quite a few Portable Chargers. By far this is one of the best I have received. It has such great power at 7,800mAh. I have charged my phone over and over and I did not have to charge the portable. It has 2 USB ports - that can charge 2 devices at once. It lets you know the amount of battery supply left by a 4 LED light indicators to show remaining charge life.
It also has a built in flashlight in case of an emergency. K2R offers a 3 year warranty. A great portable charger to have. I like that I do not have to keep charging it every time I charge my phone. I received this product complimentary in exchange for my unbiased review and opinion. All opinions and words are my own.