This one seems like a no-brainer: Longer battery life is better, right? Well, that’s true, but it may come at the price of bulk, or a higher price. Many wireless buds solve this problem by including a little case with a built-in battery that can recharge your buds on the go. Think about it, though, do you take a lot of 6+ hour flights? Maybe you’ll want a pair that you don’t have to pull out and recharge midway through your in-flight movie. Some cases have quick charge options, too.