that was my first charger before they came out with the ac/dc model, it will work but chargers that have a self contained PS are not that powerful, Hyperion has a another model that only puts out a total of 50 watts, this is the link

http://www.b-p-p.com/proddetail.php?prod=f_EOS0606i


its a few dollars more, but the 5i ac/dc model will be enough, you will just be limited as the current it will put, depending on how big of a pack you want to charge