I'm surprised no one has mentioned this yet.

**Long-handled Grass Clipping Shears**

They look like this:

[![enter image description here][1]][1]

There is another kind that uses a much bigger handle, where the entire shaft is 2 separate pieces that you can use to cut mcuh thicker weeds.

Anyway, pros and cons of this:

###Pros

 1. No gas, electric, etc.  Never runs out!
 1. Long so you don't have to bend over.
 1. Pretty inexpensive
 1. Easy to store
 1. Good for small yards

###Cons

 1. You will certainly tire out your hand if you have a large yard.

  [1]: https://i.sstatic.net/P3EFZ.png