content: I have used Dewalt 18 volt tools for several years and a 24 volt saw for the last 3 years. Out of 5 18 volt batteries only one died after 2 years of use and it was used when I got it. The 24 volt saw has only one battery and it works as good as the day I bought it. These tools are used almost daily and I dont do a good job of taking care of them.