Big Boar mini battery can be used for custom applications that have limited space. A mini battery that packs big power is what we have here. Has 300 cold cranking amps. This is a great 12 volt battery for custom applications. This battery is multi-positional and well suited for the custom builder. It will start larger engines but does not have a lot of reserve. It measures 6" x 5-1/8" x 3-1/4", and is maintenance free to fit almost anywhere.