Ideal for small boat, transom applications (boats that do not have battery compartments), this power center features easy-access external battery terminals that allow trolling motor leads and charger leads to be connected without opening the box. A built-in battery meter displays current "state of charge." Fits group 24- and 27-size batteries.WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.