The apparatus relates to a dual load tester that is hand held and highly portable. The dual load tester includes two resistive loads, and the two resistive loads may be used in series or one of the resistive loads may be used individually to test batteries, charging systems and starter motors of different voltage and current ratings. The operator of the device may, by closing the appropriate switch, first test a 12-volt battery and then test a 24-volt battery. In a similar manner, the tester may be used to test charging systems and starter motors of different voltage and current ratings. The testing functions of the dual load tester may be automated for testing various devices. The dual load tester includes a first resistive load and a second resistive load. The resistive loads may be used together or individually to test a battery, charging system, starter motor or other device.