You have to be careful because this thing is HEAVY! I haven't been able to get it to stick to the metal plate we have. Not sure, what's going on there. I have to prop it up. Mostly I use in a power strip and it works great. As for what it is actually for, it is FAST! I use it to charge my drone batteries, my Surface Pro 8, my tablet, my Flip, and Arlo batteries. No issues!