Depends on the depth of the discharge. A trolling battery discharged 30% will do fine with a 14.4 volt potential left on it for 12-15 hours.
Cycled batteries need more voltage. There is a world of difference between a battery with a 30% discharge and another with 50% discharge.
An AUTOMOBILE, or pickup truck charging system starts out at 14.4 volts. And that is to replenish a battery that has 97% state of charge remaining.
"How fast ya going?"
"Dunno. I think it's a pain keep looking at the speedometer so I don't"
"That's silly"
"I kin guess good enough and if it's good enough for me, it's good enough for everybody".
"What's those red and blue lights I see out the side mirror"
"Dunno, but they got to be stupid if they think I'm doing anything wrong"
