Charge it, or get it started and drive it. You should be fine.
12.6v after it has been sitting for 12 hours.first time it has run flat,
I came checked the battery twice more after unplugging it from my battery tender/charger, the morning after and then that evening and its hovering around 12.29 volts. I think its time to swap it out.
I expect I should be getting at least 12.6
edit: (Side note) I see some black in the strands at the terminal end, Thinking of recrimping new ends.
Can anyone think of a reason not to?
What voltage should a 12V battery give?12.6v after it has been sitting for 12 hours.