Nothing is more annoying than going on a trip out of town (or even just across the town) and having your phone or table die out on you. You could get one of those portable, external batteries for some instant extra juice, or you can get the Kii accessory charger instead.
The Kii is a teeny tiny accessory charger that connects and syncs your iDevice with your laptop or portable charger. There’s a Lightning connector version and one with the 30-pin connector that works with older iPhones. It’s especially convenient since its small size lets you attach it to your keychain so you can easily take it with you on your travels.