Over time I’ve noticed my battery light will come on for about 3-5 seconds. This only happens when it’s raining out and I have the a/c on. Also it seems to only come on when I hit a deep puddle in the road. My co- worker said I need a new battery. I don’t know how old it is. But I bought the car with 20k on it. Now it has 50k. When the car is off the battery is around 11.5 volts. With it running it around 14.5 volts. Any ideas on this would be helpful.