I have a 2007 Efi Cultus and have been facing a low battery issue for a few weeks. The car works fine and self starts just fine but sometimes with AC on the audio system shuts down if rpm falls below 700
I have checked and the voltage is
12.02V Nominal in the morning before start
14.36V from battery terminals on a cold start
14.12V with headlights on
13.98V with AC and Headlights on
13.62V with AC, High Beams, Brake Lights and Audio Amplifier On Full Blast
13.01V on AC at full blast, High beams and brake lights on, audio system on full, incl door light (basically every electrical components possible)
I also witness a minor flickering of the interior light but its very hard to notice.
Any suggestions will be helpful.
