This power bank I bought for emergencies. First I must say that I found the super caking. No unnecessary frills not too big and well protected! Shipping, as usual with Amazon, very quickly ... A couple of days I could now test without the real emergency and am really excited already! The 8000mAh rich for my Galaxy S5, despite heavy use, to operate 3 days independently. The dimensions are slightly smaller than my smartphone, but a bit thicker. Additionally there is a LED lamp installed as an emergency flashlight. A manual paper is attending, that's no longer a matter of course. Price / performance makes me happy and therefore I can this power bank so far only recommend !!!