Battery Tester's Voltage Interruptions Resolving Fluctuations While Driving

My latest issue is that every 2 or 3 days the battery guage will drop to 9V and she won't charge. The alternator tested good at the parts store. First, check the battery clamps themselves. Have they been over tightened over the years so they are distorted and cannot tightly grip the ... 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 ... Voltage reading on the dash fluctuates as voltage demands change. With batteries that are old and in need of charge, you will see higher ... Some home testing: disconnect your extras, recharge the battery and see if you still have the issue. You can get a charger that will show 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. Ok, your voltages look great, so if the gauge is still fluctuating while you are reading those voltages, then it's most likely a cluster problem ... Noticed today my volts are fluctuating while RPM's are near or above 2000 on highway trip. At stop light had battery light come on. 2021 got a warning “service charging system vehicle may stall” battery voltage fluctuates 14.5 down to 12.5 while driving can't see what the ... 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 ...