Battery Voltage Enigma Solved Battery Tester Uncovers Fluctuating Patterns

Nope. That pretty much sounds like a dead battery. It sounds as though one of the cells has a short in it, which is causing your rapid ... It's completely normal for voltage to fluctuate based on engine load. If the car needs more power (such as during acceleration), it may dial back the charging ... Observing the gauge while driving is not going to tell you the battery's voltage or charge level, it's telling you how many volts the alternator ... New cars can have an active battery/alternator management system and this behavior as you describe can be completely normal. When the temperature is warm enough, and after you've driven for about 25 minutes or more, then it reduces the charging voltage from around 14 ... This will cause the voltmeter to fluctuate between 12 and 14 volts as opposed to non-regulated systems that usually maintain a more consistent ... First, check the battery clamps themselves. Have they been over tightened over the years so they are distorted and cannot tightly grip the ... Make sure your cable from alternator to battery is absolutely clean and makes good contact at the alternator. Always use dielectric grease on ... Short drives are normally a cause of battery/charging issues and so you are not fully charging the batteries. Hence the system charging voltage ... I measured this voltage using a battery analyzer which shows live output as well as with a fluke meter. Additionally I pulled the live data with ...