wa8yxm wrote:
and last up to 10 years
And exactly how did you come to that conclusion ??
Both my personal experience and reports from places like this lead me to believe that one must be absolutely OBSESSED with taking care of your batteries to have them last anywhere near that long. More likely 5 years or less.
AGMs, OTOH will tolerate a higher "float" charging voltage (which many single stage chargers have), don't need water and suffer a LOT less if left sitting for long periods unattended and/or only partially charged.
Whether or not they are worth the extra money is a matter of personal preference.......and how much time you want to spend screwing with them.