I have a Turf Tracer hydro 48 with a Kawasaki FH500v and a Lesco 36 hydro with a Kawasaki FH430v. Both pull starts. I've added lights and a battery to each. For the past few years I've been taking the batteries off and charging them on the weekend and then mounting them again for the weeks mowing. They are 12v 3.3ah batteries. What would it take to add the hardware to charge the batteries? Is it a simple bolt on and go or? Enlighten me please.