Quick question about BATTERY VOLTAGE !!
For a 12v battery to show 12.2 to 12.4
Is very normal. Old or new. The resting voltage is based on the chemical reaction that develops just over 2.0v per 6 cells.
The 13.6ish really should not be called battery voltage though we all.say that it's the alternator output voltage happens to be connected to the battery terminal. The 13.6-8 number must have been decided as a good value to supply a decent amount of charge to the battery without over charging it.
Some newer cars will disconnect the battery from the charging circuit so they cant over charge.
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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