The Clore Automotive Christie CT800 800 Amp Carbon Pile Battery Load Tester provides continuous duty battery testing for 6V and 12V batteries, and features a variable load capacity from 0-800 amps. The CT800’s testing sequence is controlled by dual carbon pile stacks, designed to provide a sustained load with balanced control. It enables assessment of battery state of charge, battery capacity, starter draw and charging system output, and features temperature adjustment from 0 to 125 degrees F to ensure an accurate reading in any temperature condition. Made in the USA.