a simple do-it-yourself solar USB charger that fits cozily in an Altoid tin! The DIY project will charge most mobile devices via USB using 2 rechargeable AA batteries and flexible thin-film solar panels. Read to learn what you need to build your own!
14 Off-Grid Projects to Cut Your Energy and Water Usage
Military grade burning lasers are only the size of a pen but can cut like a knife, light things on fire, and have their beam be visible any where you point it; hundreds of miles away. and i would use the laser pointer to play with my cats xD
How To Make A Smoke Bomb For Signaling Or For A Getaway
So darn cool! Warren says: "Screw the Grid!" 1800 watts with a folding solar panel and 70 AMP HOUR Battery! (That means you can run a LOT of stuff to stay comfy) So Light Portable You Can Throw It In Your Car To Evacuate