Thinking about grabbing one so that I can charge my iPad mini, iPhone 6+. and battery pack all at the same time if necessary. Also so when my girlfriend comes over she doesn't unplug my stuff to plug hers in. Are these safe for iPhone/iPad charging? I know the stock apple charger would be the optimal choice, but what are the chances of me damaging my expensive stuff by using this? Also, as a side question, does it get hot? Would it be okay to stick some velcro to it and stick it to the back side of a nightstand?