Genesis NP24-12T - 12 Volt/24 Amp Hour Sealed Lead Acid Battery with 0.250 Fast-on Connector The Genesis NP series batteries are considered a general purpose battery. The construction and sealing techniques of the Genesis NP battery guarantees leakproof operation in any position except inverted, with no adverse effect to capacity or service life. All Genesis NP batteries utilize an electrolyte suspension system consisting of a high porosity, glass fiber material which in conjunction with plates, totally absorb and contain the electrolyte. No silica gels or any other contaminants are used. Genesis NP batteries incorporate a built-in design that controls gas generation and induces recombination of more than 99% of gases generated during float usage. There is no need to check specific gravity of the electrolyte or add water to Genesis NP batteries during float service life. In fact, there is no provision for this type of maintenance.