OMG! Do NOT pass "go", do not collect $200, don't even throw the DICE until you change that battery. The "steady state" or "no load" voltage does not matter in this discussion - change your battery.

I'll spare you my story of an old battery, but it cost me a tow and a $90 garage fee on top of that.

You have asked for help - here is some advice: Read post #2 again, and change your battery.