I thought I'd come on here and give my review on this awesome portable charger.
I received this charger as a christmas gift about a year ago. The person I got it from purchased it from qvc. Not sure of the price at the time but now it's around $39.00.
I did find one similar that has 2 USB ports, mine only has 1. This charger is about the size of a small cellphone. The concept is that this charger has one of those sticky patches on the back of it so that it can stick to the back of your phone while charging it so that's why it comes with really short cables. If you don't like the short cables you can use longer ones of your own. It comes with 3 cables. A lightning cable, a micro USB cable and also a USB-c cable which is used for charging the battery pack. I'm not sure how many charges you can get out of this little device as I haven't tested it as I keep it charged after a few uses so it doesn't die on me. As for charging your phone this thing has awsome charging power. My phone was down to 35 percent once and it charged it to 92 percent within 15 minutes before I disconnected it! To me that is a winner especially if you are in a hurry to go to work or somewhere and forgot to charge your phone before leaving the house. It does have a button on it which lights up to tell you how much power is left in the battery pack but of course that information is useless to us.
I am going to post the link below where you can find this awesome charger on amazon, the one in the link is the exact same one I have but mine just has one USB charging port instead of 2.