In this lesson, the focus is on understanding electricity concepts related to batteries. Students learn that a battery converts chemical energy into electrical energy, powering a circuit by pushing charge (measured in coulombs, symbol Q) around. The lesson covers essential calculations, such as determining the charge delivered by a battery with a voltage of 2.4 volts and a current of 1.5 amperes over two days, ultimately converting time to seconds for proper unit usage in equations. Emphasis is placed on using SI units and understanding the relationships between them for accurate scientific calculations.