With the assurance of Expertise Built In™, the OTR Group Size 8D Heavy Duty Truck Battery is built for power from the inside out. Semi truck batteries provide the needed power to keep your truck on the road while providing energy to all your electrical components. The patented, fully-framed stamped grid technology that optimizes electrical flow and resists corrosion for longer life. This heavy duty semi truck battery also features a specially designed lead alloy strap and anchor bonding, providing improved vibration resistance. OTR knows what it takes to repair and maintain Class 6-8 trucks, so they deliver solutions that make your job easier and more efficient. OTR warranties are comparable or better than OE and top brands. All heavy duty truck parts offer the same form, function, and fit as the OE replacement parts. FleetPride is your First Click in Heavy Duty®.