Check A Cell: * Load tests 6 and 12V sealed lead acid batteries * Works for batteries from 1 to 10 amp hours * Measures within 0.01V * Economical and easy to use * Polarity reversal indication and protection * Powered by battery being tested * Large, bright LED display * Ohmmeter Voltage Mode detects either polarity voltage including AC * Padded cordura carrying case included * Selectable DC amps polarity * 1-year warranty