I was talking with a friend of mine who specifies battery technologies for a living. Our conversation drifted to the topic of electric vehicles and, more specifically, the batteries for them.

I suggested the idea that many times the good old lead acid battery is hard to beat for many applications, even ones with severe weight requirements because:

  • Joule for joule they are heavier than newer battery types include Lithium chemistry variants, but they are not an order of magnitude heavier
  • Most everyone knows how to deal with a lead acid battery

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: