WebNov 23, 2004 · If the 12.21-12.28 V is a dead battery. Junk it. 12.6 isn't all that high so it may not be fully charged. In a car it will flucuate. Your alternator can run up to 15 volts so no it won't damage the alternator. The alternator charges the battery at a constant voltage usually around 14.5V which is how it should be done. Feb 25, 2016 ·
Car battery at 10v, then shows 14,5v while car running after boost ...
WebFeb 8, 2013 · Rep: 732.9k. 948. 847. 2.3k. Posted: Feb 8, 2013. Options. Oluseun, with the engine running the gauge should measure the output of your alternator. The low voltage may be indicative of issues with your alternator. If you have one of those that shows the voltage without the engine running, then check your gauge for a bad resistor on the … WebSep 5, 2024 · Final possibility (I think), if the battery is reading 12.5v while running with minimal accessories then it could be a bad/weak alternator. Generally voltage at the … blackwell primary school east grinstead
My 6yr-old battery is reading at 12.21-12.28 V - VW Vortex
WebFeb 14, 2024 · Today I measured the battery: After being parked overnight: 10V When car running after boost: 14.5V When car turned off after less than 5 minutes running: 12,5V 2 minutes later, back to 10V again. I did not understand how it could go from 10V to 12.5V after less than 5 min charging by alternator. WebThere are two things that you are looking for. The charging voltage should be between 13.9v to 14.4v. Also the voltage at the battery and the voltage at the alternator should be within 0.5v of each other. If the voltage at the battery and alternator don't match. For example the battery reads 12v and alternator reads 14v. WebJan 19, 2024 · Jan 18, 2024. #12. AGM for automotive use will read higher than traditional lead acid. My Oddesey battery (AGM) for the Journey used to read 12.8ish volts fully charged using their brand of charger. Make sure your battery tender is rated for AGM, if volts exceed 14.7 it can damage the battery. fox new tv show monarch