1. The problem statement, all variables and given/known data Why is it harder to start a battery in winter rather then summer? 2. Relevant equations Nerst Equation Ecell = Ecell - RT/zf(lnQ) 3. The attempt at a solution Isn't the lead sulfate bettery unique such that the electroyte for the anode and cathode is the same Pb(SO4). Shouldn't that mean that Q should always be 1 therefore ln(1) is 0. This would mean temperature has no affect on voltage. I'm confused though because I know cars are harder to start during the winter.