Battery Drain - Solved

[BMWX5CHI]

I went out this morning and tried to start my X. Starter just clicked. Charged the battery for 5 min with my Schumacher automatic charger and she started right up. Don't know what happened. Maybe the rear hatch was not fully closed or the radio was left on, I'm not sure as the last time I used her was on Saturday afternoon to buy groceries.

How could I leave the radio on? Well maybe the volume was all the way down but the radio was still on. I was pretty tired and could of left it on I'm not sure. My radio doesn't power off when you remove the key, it stays on and you can also use it without the key. When I went to start her radio was off but I have noticed that sometimes it turns off by itself with no warning.

Battery is brand new. I'm going to let the battery fully charge and see what happens. Incase it discharges again, is there anything specific I should be looking for as far as the power draw? (If there is one) My shifter light also does not turn off when she goes into sleep mode. It has always been like that since I got her and seem to recall other member stating that their X shifter light also does not turn off. Let me know what you guys think.


(Update)

Alternator is toast. Wasn't charging battery. Got no battery light in the instrument cluster at first. Battery light later started to flicker on and off when in drive. Light wouldn't turn on while in park and idling. Tested alternator by putting it in drive applying the parking brake and turning on a few things such as headlight wipers radio ect. Used a multimeter to check voltage and got 11.1 volt. Bad alternator.