I have an Echo weedeater that I bought 18 years ago. It set up in the tool shed, unused, for 8 years. I figured it was no good. But I put fresh gas in it and it cranked up on the second pull and ran like a top.
18 years old, and zero maintenance. Original spark plug. Unreal what a great machine it is.

Still, I like my new Kobalt pictured above, better. It is just as powerful and it is QUIET. Praise God for the quiet weedeater.

The great question for the Kobalt is, "How long will the battery last?"