I have an ECHO 58 volt saw. I have several of their tools, the blower and weed whip to get the most out of the expensive batteries I went all in on one brand. I don't like maintaining small engines every season and figured this would be more convenient. I was wrong. I have 3 bad batteries that I can't repair without learning a fair bit of electronics. These are not cheap batteries. The company has been unresponsive to my requests for replacement. Further the tools while very capable and convenient chew through a charged battery quickly. In the end I realized I prefer the power and reliability of gas engines, and as for maintaining them, I have learned more about that and it is doable I also realized that lithium ion batteries require care as well and sometimes the chargers they give you will not help with that.