The rate your battery drains depends on the exterior temperature, how many features you have running e.g. Sentry Mode, and your driving habits.  To test energy drain in cold weather, Model 3s were left idling outdoors in -15 degrees F temperatures (average) with the interior cabin temp set at 65 degrees. Camp Mode was activated to maintain the cabin temperature. These vehicles lost 2.2% of their battery energy per hour and had a maximum idle time of 45 hours.  Other reports have suggested that Tesla vehicles can lose up to 30-40% of distance (range).