(Mods: wasn't sure what thread this should go into so move it if you can think of one.) This is just a curiosity question, there's no problem to be solved, but I was curious if anyone could explain it. I've got a 2 year old Model S now with 30,000 miles on it. The 90% charge nets me about 222-224 miles. Aside from the expected slow degradation, it's been extremely predictable and consistently getting the same range each morning after a charge. Now for the puzzle... Tesla gave me a new UMC on Saturday because my previous one had a charge fault (some degradation on a pin). I charged with the new one for the first time Monday night and came down to 227 miles of range in the morning. I haven't seen 227 in many months! Like I said, ~223 is the typical amount. Nothing else changed, just the UMC. Why would swapping out the UMC suddenly bump my range a few miles on the next charge? Pure coincidence that happened the same night some sort of internal battery leveling occurred? It's not a big change, but since my charges have been so incredibly consistent, it made me curious.