6000mah is rather good for this battery pack. I got to charge my iPhone 6s a few times before I had to charge this battery pack. It's nice how it includes it's cable for charging (usb adapter not included) and the little bag for travel. It lights up to tell you the percentage of what battery is left. It has two inputs for charging, 1A and 2.1a so please do a bit of research to find out which one your device is meant to be charged with. Overall, this item is great and I highly recommend it!