Patented single load, dynamic resistance technology minimizes battery drain during test.You will never be fooled by conditions such as surface charge, parasitic drain & contact impedance.   Easy, Fast, Accurate, Affordable. ■ Test two series of battery:    1. VRLA/GEL/AGM, CAL/CAL & SPIRAL        Batteries.    2. Regular Liquid batteries. ■ Test both charged & discharged batteries. ■ Test based on SAE, DIN, EN, IEC & JIS    (Battery Type No.) ratings, the industry     standards for batteries. ■ In 2 seconds, testers show    recommended actions. No more guessing.