I really need a external battery as the 3g battery barely lasts a day with heavy use. I found this product on ebay but have not heard anyone talk about it, anyone know anything about it?? http://cgi.ebay.ca/NEW-iPhone-3G-US...yZ118261QQssPageNameZWDVWQQrdZ1QQcmdZViewItem Does anyone know of any battery products that are good (actually are there ones that you can carry around AND charges with the car?). I was going to buy the kensington one but it turns out its not even out yet, only pre orders! Thanks!