hi dave
i've got 2 yuassu 75 ah batterys, i rotate them, so one or the other is always on charge , i use a halfords intelligent battery charger,i change battery daily , so they dont get to drained, as this will shorten battery life , dont use a split charger as a lot of my work is close together, so battery would not get chance to charge properly, work 7-8 hrs a day, my batterys are 2 years old .
daz