Battery Tester Unraveled Analyzing Fluctuating Readings Mid-Drive

It sounds like the voltage regulator inside the alternator is bad. Just an FYI most all auto parts stores will test your alternator, battery, ... This will cause the voltmeter to fluctuate between 12 and 14 volts as opposed to non-regulated systems that usually maintain a more consistent ... 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 ... Reason is, your charger might see it as a short (very high amperage load at the onset). Also, check terminal connections for corrosion or lose ... Battery Voltage Meter Fluctuating. Dealer claims it's normal. ... Service claims it's suppose to according to battery needs. Never heard that ... Voltage varies depending on battery conditions, and which electrical loads are switched on. All the voltages you listed are in the normal range. Check the alternator belt: If the alternator belt is loose or worn, it can cause the battery gauge to drop as well. You can check the tension of ... You'd have to test the battery monitoring sensor and the battery itself to see if there is actually an issue or not. BUT I can say that the ... After 10 minutes or so of driving, the voltage of the battery will drop and hover in the range of 12.2-12.5. There are 2 ways is raises back up. 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 ...