Whether you have an iPhone or another wireless charging smartphone with a magnetic case, this Anker magnetic power bank is battery is a must-buy now that it’s half off and down to $40 on Amazon. What I love about the Anker 633 Magnetic Battery is that this is really a 2-in-1 gadget — not only does it wirelessly charge your phone with a magnetic snap for perfect alignment, but it also has a foldable stand so you can prop your phone up while it’s charging. It’s also compact and lightweight, so you can freely hold up and use your phone even while it’s charging. That also means it fits easily into…