this is a good solution for people who need an extra battery. this will give you the chance of charging your battery for 19.99$. it can be used also as an extra wall charger.
[video=youtube;aAROB7jFvnQ]http://www.youtube.com/watch?v=aAROB7jFvnQ[/video]
[video=youtube;aAROB7jFvnQ]http://www.youtube.com/watch?v=aAROB7jFvnQ[/video]