since this is a electric start lawnmower I have to look for the battery which is right underneath the cross member of the push mower I looked it up is the pipe amp hour battery this is the charging connector and I charge it for a couple of hours and the voltage is about 13 books so this is the adapter now puts 100 n lay so this being a 100 M a 15 volt that means a it's about a watt and a half and the battery is about 50 60 watts so it would take 30 if it is that half charge will be 30 hours so it's more than one day to fully charge it the manual recommends charging it after each use so that means there is no recharging so like I alternate or anything like that so you really have to I guess the best thing is just to check the voltage and if it is anything below twelve point six I would charge it so right now it's good I'm going to charge it there maybe another two hours it did stop before after three years surprisingly with the battery one but I would definitely check the voltage and I wouldn't let it go past thirteen four volts you probably kill the battery of the older charger you so I charge it up to 13 volts or so and I just primed it you