I'm already buying the third one. The first one was used by my ex-wife, the second one I used myself for many years until I foolishly connected it to a laptop charger and it burned out. So, the advantages: good capacity, can charge 2 devices simultaneously, although the power will then be 5V*3A=15W for both. Fast charging, voltage and current indicator, metal casing. Cons: weight, very heavy. Probably because of the metal casing and powerful battery. I also want to note that previously the button was concave, slightly recessed into the case to prevent accidental pressing, but now it is convex. Packed well: thick cardboard box, inside there is another cardboard insert, a bag. As a gift, a short cable and a set of stickers. Is there any manual available? In short, if you want a good and reliable Powerbank, take this model, you won't regret it!