I've posted on Tesla's forums about this, but haven't had any luck. I purchased a Model 3 for my mother, and while she's loved it overall, the battery drain is ridiculously high. At 8PM last night it was at 262 miles -- this morning at 11am, it's at 243. She hasn't driven it in that time. The tip we got was to make sure our phone keys weren't repeatedly waking it up. We've completely disconnected both phone keys and solely use the keycards to lock and unlock. The software is version 2018.14.13, I believe it's the latest. We've taken it to Tesla service, and they've promised to file a work order and email us: that was over a week ago when they said they'd do it "today". What else should we be trying, short of going back to the service department?