I got this for my gram. She can use a cell phone that is about it. When the power goes out her phone is never charged. SO now with this she can charge her phone. It is easy to keep charged. Just plug in the included cable to a USB source to charge the bank. There are 3 ports for shcarging USB devices. And makes me worry less knowing Gram can charg her phone when the power goes out. #Rankboosterreview #Sponsored #ANGUO