I need to replace my trolling motor batteries. I haveused AC Delco batteries (voyager M30HMF)in the past butI understand that they have changed this battery and it is no longer a sealed battery.The two I need to replace have lasted4 1/2 years of heavy use. Anybody have anyexperiencewith the new Voyagers or have suggestions onquality deep cycle batteries for a 74lb 24 volt trolling motor?</p>