Floor Jack - Disconnect Power Supply?

I bought a floor jack this weekend.

Page 5 of the manual includes this statement as the last step of the "Lowering" process:

1. To prevent accidents, turn off the tool and disconnect its power supply after use. Clean, then store the tool indoors out of children?s rea ch.

I had to leave the jack in my driveway because once I disconnected the powe r supply (me!) there was no way to roll it into my garage to store it. I gues s I'll have to rig up a towing system to pull it into the garage.