I was surprised to get a notice about charges on my phone this afternoon. First off, I accidentally had my charge limit set to 50%. I got a notice that my charging was almost done about 5 minutes after I started. I bumped it up to 90%. When it got to 80% I got another notice that it was almost done. I was done checking emails and didn't really need 90% so I changed it from 90 to 80 (where I leave it for home charging) and got out of the car to unplug. In that 30 seconds or so, the app alerted me that it was done charing, followed quickly by a notice that charges were about to incur. That's the first time I recall seeing anything about charges before. Super perplexed though... I was alone at the charger! I was with the car the whole time, and I know not a single other car was there at any point during my stay. Not one. It is an 8 stall and I was the lone car charging the whole time. So I'm not sure that the 50% full thing is very accurate. I've been curious because the in-car charging map often shows stalls in use but when I get there I'm almost always the only one there. Is it averaging over X hours or something?