I bought this at Walmart without knowing if it would work or not and I love it! I charge it so that its always full and when I need it for my phone while I'm out and about, it's the perfect little alternative charger for my Samsung Galaxy Note 4. Didn't cost me much and I think it's a great product. I would certainly recommend it to anybody who's always on the go, charge it and your at night(separately of course) and when your phone runs down, hook it to this little baby and you're back to 100% within 10 to 15 minutes, while using your phone! Only thing I would change is the weight of it. It's kind of heavy trying to hold it and talk on the phone at the same time. Maybe create a case that both of them can fit in to make it easy to hold while using your phone? Just a suggestion.