I've had a few power banks in my time but this one is unique - it's so small and charges my phone about 2 times, I've got a Galaxy s6. This little pack is perfect for me, I use it all the time. Fast delivery too.
Best buy an electronic user can get !
I really like this one because it's so small and I really like the design of it. The others that I've gotten have been big and bulky. I've been using it for over 6mths now and I highly recommend