24 minutes at 10 amps is not one forth charged. Double it and it would not be half full. Around 12.3 volts. You have described in precise detail
A
BAD
Battery
Thirty five years ago I designed batteries and I made and constructed TESTS for flooded batteries. Life cycle testing, Ampere hour qualifications for BCI, and finally pulse charge desulfation design and analysis.
This is exactly why I would rather **** down my leg than have a burger-flipper argue whether a battery is a fatality. I go to Costco not Wal-Mart, Sears, or Pep Boys.
And with this I sign-off commenting as further time will lead nowhere.