Overcharging. What to check next??

I put the charger on the battery for a few hours this morning and then took the truck for a drive so everything was warmed up. At cruise speed it is still charging 15.06v without any electronics turned on. With the lights on and heater wide open it drops to 14.97v. With the engine off the battery is at 14.10v. Is this something to worry about or are those numbers ok? I don't want to fry any more wiring or ruin my good optima battery. The battery doesn't feel warm but it wasn't a really long drive.