I just got back from CE Week and I always try to travel light. Instead of carrying a battery pack and a USB charger as I wandered around the tradeshow floor and around New York City, I tried something new, namely TYLT's Energi 2K Travel Charger. This compact "block" has 2,000 mAh of battery life, a USB port, and a flip-down prong for charging via the wall. This eliminates the need to carry two separate devices and made my life a lot easier. Combined with a retractable Lightning cable, I was able to keep my iPhone charged and recharge the Energi back whenever I was near a wall outlet.
TYLT has created some great accessories recently, and I've written about most of them. They are well designed, and available in a variety of colors. What sets this product apart was that it was crowdfunded thanks to Kickstarter, which shows I'm not alone in wanting such a gadget! If you didn't get a chance to back the project on Kickstarter, check out TYLT.com to get your own.