Hand-Powered Night Vision Scope

This device is a night vision scope, but it doesn’t require any batteries. Instead, it’s has a lever-activated power supply, so you can generate your own power ad hoc. You’ll can see in the night without fear of an energy failture. It is priced around $200. See Camping Station or other vendors.

MetaEfficient: Hand-Crank Coffee Grinders

Grinding coffee by hand has a few advantages: it’s quiet, it yields a more uniform grind, and you can take them camping. You can find hand-cranked grinders at Amazon.