1. The problem statement, all variables and given/known data An engineer is trying to model a lithium battery with a thevenin equivalent circuit. She first connects a voltmeter across the battery and gets a reading of 3.7V. She then connects 0.5 Ohms resistor across the battery terminals. The reading now drops to 3.2V. Draw the equivalent circuit for the battery and work out the circuit parameters. 2. Relevant equations I understand how to derive the equivalent circuit but i do not understand what circuit parameters represent 3. The attempt at a solution VOC=3.7V R=? I do not know how to derive the internal resistance of the battery also Now, i dont understand what the circuit parameters mean. What are they asking for?