Quote:
Originally Posted by DEpointfive0
Fair enough, I think I started doing it too because my crank pulley is 20% underdriven and I have the stock alternator pulley. And sometimes while stopped at a light or something, you see the voltage dip from 14.2 to like 13, which is still good, but I just wanted to know if topping off the battery is bad in any way
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If you want to be sure you are getting enough charge (if you do a lot of idling with an underdriven alternator, it's possible you are not), just put a voltmeter on the battery when you get home. A 100% charged lead-acid battery will read 12.6V and drops to 12.35V at 75% charge. Edit: Anything above 12.4 is usually called "charged".