Compact, portable Battery and System Tester is easy to use, with simple operation that walks the operator through the testing sequences. Operating range of 7-15V. Can test batteries rated between 100-1200 CCA. Has the convenience of starting and charging system testing and offers quick assesment with a numerical and pass/fail LED result. Compatible with a wide range of battery types including Conventional, Maintenance Free, AGM, Gel Cell, Deep Cycle and Marine batteries.