1. The problem statement, all variables and given/known data A 12.0-V battery is connected to a capacitor, resulting in 54.0 μC of charge stored on the capacitor. How much energy is stored in the capacitor? 2. Relevant equations 1/2CV^2 3. The attempt at a solution At first this problem looks to be easy for me but somehow I get a complete different answer than the back of the book. I plugged in all the variables and solved and got 3.88 x 10^-4 J 1/2(5.4x10^-6)(12)^2 The answer I get in the back of the book is 3.24 x 10^-4 J Can someone please explain to me what I am doing wrong?