Whether you’re checking your Fastpass+ reservations and dining plans on the My Disney Experience app or taking that perfect castle shot with your family, a charged phone is a must in the Disney Parks. Nothing is worse than getting that ‘low battery’ notification just hours into your Best Day Ever! (And let’s be real — If you didn’t Snapchat or Instagram Story in the parks did you really go?) After countless trips to Walt Disney World (most with a phone in  ...