Get your vehicle Ready for the Road Ahead™ with a reliable battery that powers your components all year round, with the Odyssey Group Size 31R Extreme Battery. With a rugged construction and non-spillable AGM design, this replacement battery for semis is protected against shocks, vibrations, and bumpy conditions. Manufactured with sturdy and heavy duty materials to effectively hold a charge, jump start other vehicles, and keep your vehicle running its best in all types of weather conditions. FleetPride is your First Click in Heavy Duty®.