Patent ID: 8493021

Claim:
A method for delivering supplemental power from a portable jump starter to an engine comprising the steps of: positioning said portable jump starter proximate the engine: temporarily manually connecting conductive leads from said portable jump starter to the electrical system of the engine; automatically selecting a voltage output of two or more system batteries housed in said portable jump starter, wherein said selected voltage output is 18 volts or 30 volts; verifying the polarity of the conductive leads and providing an alert if said polarity is incorrect; assessing the voltage level of said electrical system, if the voltage level of said electrical system is below a predetermined level, then electrically connecting said portable jump starter system batteries to said electrical system to charge an engine battery connected to said electrical system to a predetermined voltage level; applying power to said electrical system; monitoring the current output of said system batteries; measuring one or more voltage levels to determine one or more fault conditions; examining the current through a shunt cable; and electrically disconnecting said portable jump starter conductive leads from said electrical system when the engine starts.