The EnerPlex Jumpr Slate 5K is an ultra thin 5,100 mAh portable external battery that is perfect for placing in a binder or folder for on the go charging. Also, the Slate 5K's tethered Micro-USB cable makes it easy to charge a variety of USB-enabled devices like Samsung Android smartphones and tablets whenever needed. There is also an Iphone version.
For more great camping gear, check out the rest of the 2017 Cruiser Camping Guide!