Having multiple devices that need to stay juiced up while you're out and about means that a portable charger should be a standard part of your on-the-go gear. If you don't already have one – or are in the market for a new one – Daily Steals has quite the deal going on a massive 9000mAh battery pack that can charge up to four devices at the same time.
The primary thing that sets this charger apart from comparable units (aside from being able to handle four devices at once) is that it actually has built-in microUSB and iPhone 30-pin connectors, so you don't have to carry extra cables with you. It also has dual USB ports for charging devices that may not use a standard microUSB port. The right port is 2.1A and the left one 1A.
For today only, you can get this beastly multi-tasker for $29 with free shipping. It seems well worth the money – but you better hurry and grab one before they're gone. For comparison purposes, the same charger is currently listed on Amazon for $45 with an admirable 4.3-star rating.