Hi! I found this iPhone 7 Qi Wireless Charging Adapter and I Have some questions. First, this is safe? It can destroy or faster drain battery life (lower mAh)? Second, it is compatible with other wireless docks? Third, it is worth? I am asking, beacause I can buy to this wireless Power bank. I can buy It or normal dock like this: iPhone Lightning Dock What should I get? Thanks for replies