PowerGen Mobile Juice Pack (External Battery Charger)?
I have an iPhone 4s, and the battery life sucks. But, alas, I'm stuck with it.
I'm going on a trip in a couple of months, and I've been searching for an external battery charger for on-the-go travel.
I've been looking at the PowerGen...
I'm not sure about buying them, but if you're still close to your college (or maybe still enrolled) you might be able to rent equipment from the college. You can probably pay a fee for library privileges at your college, which entitles you to borrow equipment.
I borrowed projectors frequently...