Hey guys, I was wondering if you guys have had experience with this one. It seems good but I have no idea and they go for much higher than the regular 4 AA battery types.

Here's the link: http://cgi.ebay.ca/EXTERNAL-EXTENDED-BATTERY-PACK-CHARGER-FOR-APPLE-iPHONE_W0QQitemZ270180230005QQihZ017QQcategoryZ152 376QQssPageNameZWDVWQQrdZ1QQcmdZViewItem