Better Gadgets Needed

It turns out that the cable I use to connect my digital camera to my computer can also be used to recharge my Razr by using it to connect the phone to my laptop. So if that works, then how come Canon doesn’t make it so that the Camera battery can be recharged this way as well? When traveling, it’s always nice to minimize the number of discreet power items you need to take with you and risk losing.