my 12volt failed and what i did buy a new one.. but the org. is a sealed battery. so i drilled some holes in the housing where normally the filling caps would be i put in some distillate water, filled them up and put a Qtek charger with disulfation mode on it for a while! then did a normal charge then put a cranks amps meter on it and what..... well it worked! no need for a new battery.. thats the best environmental way seal it back up with some tape and you ready to go. be carefull with this about the battery acid!! do it at your own risk.