A lot of difference between a battery surface charge, and a deep charge.
A 2 mile run won't fully charge a discharged battery, 3>4 hours of run time, minimum . Rec-commend a battery tender or small solar panel to maintain battery if no 120v available.
EDIT: Or complete battery disconnect, the Electronic Control Modules , engine & trans, are a constant drain , and cars on a car lot will drain their batteries in 3>4 weeks.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.