Battery Tester Diagnostic Dilemmas Navigating Fluctuating Readings

Sounds like a bad battery, but I would also check the output of the alternator to make sure it's up to par. You need to see at at least 13.5 ... Seems to be a normal variance between charging/not charging once a battery is essentially full. Your fairly lengthy trip probably gave your ... It sounds like the voltage regulator inside the alternator is bad. Just an FYI most all auto parts stores will test your alternator, battery, ... 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 ... When the batteries are under load such as driving the cart. The battery voltage drops, which is why it's the percentage drops. The most ... It sounds like your system is operating correctly. You will see charging while driving until the battery is fully charged, then it will gradually taper down to ... Voltage reading on the dash fluctuates as voltage demands change. With batteries that are old and in need of charge, you will see higher ... The slower the engine is running and the higher the electrical load is it will cause voltage to drop slightly but if you increase engine RPM the ... For a new battery that voltage is a bad sign for the battery, like I said charge it and load test it. What brand ... Testing the battery, with the car on (headlights and heater on ... mine fluctuates, startup its around 12.8 for a while until i drive ...