I am working on a 1995 Lawn Boy model 10545 that requires a small 12v battery to start electrically. The lady who will be using it can't pull start it due to health problems. I found a replacement battery but Lawn Boy instructions say to charge for 72hrs before use and 48hrs every month . What is the output for the small Lawn Boy chargers? Has anyone found a battery charger/maintainer that can be used with this battery?