Misther D Posted June 13 Report Share Posted June 13 After a full year of asking others, taking my 2013 Energis (I have 2) to the dealer, and constantly having to jump start my cars, I have finally gotten around to learning Forscan and updating my ACM. Worked well but one now has a low battery and driving it a few times didn't charge it. I had my local auto supply store test the battery and it tests fine. They said that my Voltage Regulator is bad. Not true - right? No Alternator mean no Voltage Regulator - Right? My question: Is there anything equivalent to a Voltage Regulator that could be causing the battery to not charge? Is that the DC-DC? Or is this likely just a matter of buying a battery charger and letting it charge overnight? D Quote Link to comment Share on other sites More sharing options...
homestead Posted June 14 Report Share Posted June 14 Short drives won't fully charge the battery. Stick a battery charger on it and charge it fully. See how that goes before changing anything. Misther D 1 Quote Link to comment Share on other sites More sharing options...
cr08 Posted June 14 Report Share Posted June 14 Really easy way to check is simply check the voltage while the car is running. It should normally show 14+. If so, follow homestead's advice. Also if this is the original 12v battery, it's way past its useful life and likely needs to be replaced. Quote Link to comment Share on other sites More sharing options...
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