I am getting ready to set up a shurflo sprayer and need some advice. I have done a search here and on powerwash network and got some good ideas. I want to set it up like Glenn at Ace Pressure washing has his, on a dolly so I can change 5 gal buckets instead of 15 or 25 gal tanks. Also someone was putting on a 45 psi and a 60 psi pump on the cart to spray cleanen and sealer, another good idea. My question is has anyone ever used a lawn mower battery to cut down on the weight? Do you think the battery would last very long on a charge and how many charges would it take till it died?