I always carry an external battery in my bag with enough juice to repower an iPhone 3 times over (and enough cell phone tips that I can recharge others' phones

I always carry an external battery in my bag with enough juice to repower an iPhone 3 times over (and enough cell phone tips that I can recharge others' phones in a pinch). Most of the battery+case combos work pretty well, too. I'd prefer the internal battery was accessible, beautiful design be damned, but it's not like it's a difficult problem to work around. (In practice, the iPhone 4's battery actually lasts for 1.5-2 days of heavy usage, so it's seldom an issue, but of course that won't be true a year from now.)