BatteryThe 12 volt lead-acid battery for my backup sump pump does not seem to last for more than about one year. There is a “maintenance” battery charger that is, supposedly, designed to keep a battery topped off and ready to go should the backup power be needed.

I have heard the rumor putting batteries on the concrete floor will shorten their life. Research on the net suggests a few theories why this is or was true. Thoughts include: