If you're an individual who breezes through the battery life on their smartphone or tablet, having something to charge it on the go can be crucial. Battery packs come in extremely handy for situations where you might be nearly out of battery life but are nowhere near an outlet to plug in. RAVPower is fairly well known brand for battery packs but they're products are usually a little more than some are willing to spend. This deal for the RAVPower 8400mAh battery pack is a great deal for the savings alone. It's got two USB ports to charge two devices at once, a microUSB port for charging the pack itself, and an LEF flashlight for whenever you might need one.