These batteries are great!! It only weighs 5 pounds but has 780 cranking amps of power. They can be mounted in any angle, even upside down. You can buy top posts for them if you want to use it for a top post type battery. Used one year as power for a heater in a race car for nitrous tanks. Not using the heaters anymore so no need for the battery. Can be used for cars, boats, motorcycles and other power sports. A standard alternator, like what's on every car, will charge the battery. 

Battery measures 6 3/4" x 3 1/4" X 6"

These cost over $400 new so it's a steal of a price if you are looking for one.