Something my son told me...and I think it is working pretty good...is to go to Advanced and buy a box of battery acid to add to your batteries instead of distilled water. He has some batts working on 7 years now and I have some 3 or more years old now and have been using the acid that long. Time will tell for me but those batts are amazing that my son is running. BTW, theyre Everstart batts too.. I'm also a firm believer that an onboard charger is key too.