12v battery - difference between charging and maintaining?

[SnBGC]

13.42 volts is a charging voltage. A fully charged battery, after the surface charge has been eliminated, is 12.7 volts. A 50% charge is 12.2 volts. A 10% charge is 11.94 volts

Thanks. Good to know.
Confirms that my issue earlier this week wasn't caused by the LVB since the reading on my gauge was never lower then 12.9 and usually around 13.4.

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