I am finally, finally going to get to go on vacation. I need to be able to keep up with my work email while I'm on vacation though and figure I should carry an extra battery with me just in case. I think I need a way to charge the extra battery outside the phone as well. What do I need to buy? I want something I can plug into the wall at the hotel at night and I can toss the extra battery in my camera bag while I'm out exploring Vegas.