I have had this Schumacher onboard charger permanently mounted on my 2003 Ariens 1128DLE snowblower for 7 years. I am still using the original battery! I am now going to buy a second one for my lawn tractor. There is nothing like NOT keeping at least a trickle charge on a lead acid during months of non use to shorten its life. This charger will easily pay for itself by extending the life of your battery.