Most car battery’s aren’t fucked most just need a good charg to 14.6 volts some chargers have a repeat mode that charges to 14.6 volts mine dose but it over charges on mine normal charg charges to 14.6 volts it takes all the shit of the plates on the inside so it can hold its charg and you can put Epson salts in its water to help clean it i think it 1 part Epson salt to 3 parts distilled water but try charging to 14.6 volts first its just a ploy to sell more battery’s that’s why they seal them now you to be able unscrew caps to put water in but is good to check water level to make sure it over the plats
