Battery Behavior Analysis Battery Tester Uncovers Fluctuating Patterns

Testing the battery, with the car on (headlights and heater on ... mine fluctuates, startup its around 12.8 for a while until i drive ... Get the battery load tested. Only way to confirm battery is indeed good and not having a weak cell only holding a ''surface'' charge. When I start my car, my volt meter is showing a steady 13.8 volts. However, once the car heats up, or after 10 minutes driving, it drops to 11.9 ... Short drives are normally a cause of battery/charging issues and so you are not fully charging the batteries. Hence the system charging voltage ... When the batteries need to be charged, the voltage goes up to 14.4v or so, and when it senses they are charged it drops way down, I've seen 12.9 ... Usually when its an alternator, the voltage drops when the engines up in the rpm range, because it cant charge the battery sufficiently. Id go ... Believe it or not, the battery acts as a capacitor when the car is in use, to keep the voltage level stable. If you see the voltage going up as ... Follow instructions for testing. ... Because of the fluctuating voltage, chances are you need new alternator brushes, in this case Jeepman's ... Yes normal behaviour. In your case, something else is going on. Check your battery post for corrosion. 2023 ... First, check the battery clamps themselves. Have they been over tightened over the years so they are distorted and cannot tightly grip the ...