Well we usually delt with grime covered batteries out of farm equipment. I can only remember a few cases that needed a battery on the spot where the vehicle was running on a dead battery that had seen regular use. But other than those few special cases, if they hadn't said they charged the battery the day before we would ask them to try it before buying a new one. It was suprising how many lasted for a few more months and you could tell those old ranchers were happy they tried it. Really helped boost customer brownie points for the younger guys compared to the leaders and managers who were always trying to sell the most expensive of everything.
