I've done my research on this via the Owners' Manual and on Volvo Fourms, and both say to leave my key in the 1 position for 2 hours to enter the code, (I have the correct code) I'm just afraid that sitting the car with the key in for 2 hours (even on ACC) would drain my battery.

Should I be worried about battery drain at all?

NOTE:

All running lights turned off (headlights, overhead lights, etc)

 

to the forum Alex

Any chance you have or can borrow a battery charger and use it on low to make sure the battery doesn't get to low ??