This thing started right up after sittin' 3 1/2 months in the cold, with temps below freezing most of the time. I looked all over for the battery that goes in it. Not near the Battery Tender with the others - and then I realized I forgot to take it out ! Shit ! It's a 5+ year old acid-type battery, and it hasn't given up yet, since it had 12.2 volts and started the bike. It's life is helped by the Cycle Electric DG5000 and a steady 13.5 pretty much all the time. My 4 gallon tank is ready for fuel - and I'm ready for a road trip - but we should all be sittin' tight for now.