Stop in for a cup of coffee

Arggggg. The battery us dead in the truck and it's parked in front of the wife's garage door. Quick throw on the charger. I wonder if that's not the problem with the truck loosing idle. Sometimes when I start it you have to re-learn the idle. I thought may be IAC but no Ses light. May be just a shorted cell in the battery.
Yup. Low cranking voltage gives ecu a bad headache...