Smartphones have come quite a ways in terms of longevity when it comes to battery life, but they still manage to drain before we want them to sometimes. This is where battery packs can come in useful as they can provide some extra juice. Omaker has a deal right now on Amazon for their Intelligent 10000mAh battery pack where it's on sale for $16.99 down from the normal price of $49.99. The reason it's intelligent is that it speeds up the charge time based on the device that's plugged in, so if can handle a faster charge it will give it up to 2.1 amps with a 2 x 2.1A output. The pack also has an integrated LED to show the status of how much power is left, it has two USB ports to charge two devices at one, and it carries a flashlight in case you need a little extra light.