The Power Bank fulfills its purpose 100% and invites my device (0% to 100%) within 1.5 hours. Up to 3 times. The workmanship is very good and very valuable to the "aluminum" enclosure.
Only when you open the packaging did notice that on and around the power button a layer of adhesive was to be found, but which disappeared with a wipe.
On the whole, I like the product very good and definitely recommended for the price !!