Urine Powered Batteries
Yes, $24 for six AAs is steep, but they hold their charge for up to 10 years, and, let's face it, you're never going to have trouble finding a couple mils of pee when they need a reboot. NoPoPos (No Pollution Power) are eco-friendly and emergency-ready batteries that are fueled by handy, everyday liquids most people can't wait to get rid of. OK, mostly water, but their Japanese manufacturers assure us OJ, Coke, beer, and your very own streams of gold produce the same effects. Available in AA and AAA sizes, the batteries are ideal for power outage, earthquake, and zombie apocalypse survival kits (along with zombie ammo, of course). They are also made of 100% non-toxic materials, so Mother Earth won't have wonder where she went wrong raising you after you max out their 5-refill capacity, and dump them in her lap.
The liquid injector and filling directions are included in the battery package, but the manual is in Japanese, so check out the video above for easy instructions for use.