I am installing a rear view camera/Android tab and have drained the battery several times. A trickle charge sets it right again. Now I've completed wiring etc I was testing camera setup, maybe 15 mins of tailgate and door open, a few ignition on/offs. Drove the car 2 hrs later for 2 mins, shut off and click click when I went to restart.

No idea how old the battery is and under normal load/usage it works fine.

Are the X5 electrics pretty sensitive? Is there a circuit drain with door open and lights off? How long should you be able to keep in acc mode/door open and preserve cranking power?