Dirty Battery Causes Discharge

Can a dirty battery create problems on my boat?   Dusty, dirty batteries can cause accelerated self discharge. The battery you see in the photo above is somewhat vulnerable to accelerated self-discharge if the dust and sawdust you can see on it's top surface gets moist. In a general sense today, new batteries are far less susceptible to self-discharge, especially via their case tops. This all has a lot to do with the case materials being made of smooth, plastic materials versus gooey tar ...