Yang L

I have a 2017 q7 and I am planning 24 days long vacation, will my battery be dead by then?

ConservativeConsumer

I would not worry much about it. Make sure your car is locked as this will lower your car systems "preparedness" reducing battery consumption during rest. But if you have concerns - get a battery tender and get it connected during your absence.Something like this will do:
I have Battery Tender like this one or similar and have its "eared cable" bolted on engine bay's power pins so it's easy to connect charger at any time. Alligator clips cable I use for other small batteries charging - like snowblower's, power washer's, etc. - when needed.

Paul Collurafici

My mom only drives 1-2 times a month. I bought a battery tender that plugs into her cigarette lighter. It works great and she can do it herself too!

Yang L

thanks for the replies sorry i forgot to mention that I live in an apartment complex with no access to an outlet.

markchen

For your reference, unplug any non-original devices attached.
If you don't drive for more than three days, the only concern should be the keyless system. If this is the case, you can always use remote to unlock the car and resume the function.

mbs

That wouldn't work on my 2019 Q7 as the cigarette lighter is turned off when the car turns off. (My last two Audis left the cigarette lighter socket live all the time)

Polonium1

I have left it for 2 weeks outside when travelling abroad many times. No issues.

Wires

If you cannot trickle charge it, I'd say disconnect the battery. Typically a battery needs to be topped up every 30 days (no load) to prevent damage to the cells. Your car will be sucking power on top of that.

I went away for 10 days with no issues, but 24 is a long time.