Apple's Watch launched two weeks ago to some incredible hype (read our review!), and while it almost seemed impossible to not know every single little thing about Cupertino's latest gadget, the company has just one more trick up its sleeve. On one side of the watch face (beneath were you insert the interchangeable straps) is a hidden door that exposes a 6-pin port. It's assumed that this could be used for diagnostic purposes, but with an Apple Watch in hand, company Reserve Strap was able to verify that it could also be used for charging. This is both huge and...