new battery fitted give the old battery a good bashing with the pulse charger and the results probably gave me this year out of the old one.you can vitalise the old standed batterys and even change the acid but we have idiots out there so we now have to live with agm and dry mat batterys.the superdream now has a agm battery .tested before with old battery the tester checks cranking power charge rate and other things ,if the tester says its happy i am.test with new battery perfect