With Expertise Built In™, the OTR Group Size 31S Gold Anchor Bonded ECL (Extended Cycle Life) Heavy Duty Truck Battery is built for power from the inside out, as the bridge between AGM and the traditional flooded battery. This Gold OTR battery “workhorse” features anchor bonding, which “anchors” the plates to the bottom of the container, providing improved vibration resistance and protection from bumps in the road. Furthermore, the Extended Life Cycle ensures twice the cycle life of other Group 31 batteries. Gain the advantage of OEM level performance in cold to hot temperature zones for reliable reserve capacity and cranking ability. OTR knows what it takes to repair and maintain Class 6-8 trucks, so they deliver solutions, making your job easier and more efficient. OTR warranties are comparable to 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®.