So i recently did a little test with my Model S 75D. I charged to 100%, and ran the battery down almost to zero miles left to see what the usable Kw were (just approximate). What I found (fig.) is that the number was not even close to what people have reported as the usable KW for a model 75 Battery (72.6 I believe). Can anyone explain this difference? At 10KM left, since the last charge the used KW is 59.6. Seems like about 12KW of usable power have vanished. (BTW this test was done over less than 24 hours, so shouldn't be that much "vampire drain").