T his type of batteries has flooded electrolyte and is very accessible. These batteries have to be carefully and periodically maintained. The conventional batteries are normally less expensive than the other types mentioned above, but with the cost savings come more maintenance. You will need to add distilled water from time to time to prevent the battery from sulfating. Water loss is a normal characteristic of this type of battery because of the high temperature inside, and the process of electrolysis and evaporation. This means the fluid level of the battery needs to be checked on a regular basis. Conventional batteries also tend to discharge more rapidly than AGM type batteries.