plctech

first, recharge the battery, if after charging the battery looses power there are a few things it might be, either the battery is worn and needs replacing, or there is an electrical fault that is draining the battery, remove the positive terminal from the battery and using a meter see it there is an amps pull when nothing is switched on, if there is this problem will need to be sorted, if the battery does'nt loose charge and there is no power drain it will be the alternator that is not recharging the battery during use. the most likely fault is a dead battery, batterys should be recharged every 3 months or so when not being used, if you havn't used the mower in a year this is probably the fault