A DIY hand crank Boostbox by lasersaber at LaserHacker:
This easy to make box uses no batteries but can still power a lot of stuff. It really is a very versatile little BoostPack based device. It would be the perfect thing to have on hand in times of emergency.
Project info at LaserHacker project page.
Check out the video after the break.
from Dangerous Prototypes https://ift.tt/2EHdmcO