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Battery lost 8 to 9 mi range suddenly

miimura

Well-Known Member
Aug 21, 2013
5,989
5,567
Los Altos, CA
Yeah. But you said your percentage didn’t change. Wouldn’t it have changed with the range increase?
Percentage is percentage. It always goes from 0 to 100%. I'm saying that Tesla is only changing the conversion from the kWh the BMS thinks is in the battery to the displayed miles. This is the "rated range" efficiency constant.
 

BAven8068

Member
Nov 5, 2016
208
188
Chicago
Ive had the same random drop in displayed range after an update on my Mid Range car.

Car was originally sold with 260 range.
Sometime in January they increased the range to 264 with the 2018.50.6 update.
Car held the updated range through another update (2019.5.15)
Shortly after the car updated to 2019.8.3 it was showing 257-258 at 100% ~6 mile drop.

B43E8C21-076C-4DED-8C36-D4643C5280CD.jpeg
 

hcw0818

Member
Dec 4, 2018
12
0
30024
Ive had the same random drop in displayed range after an update on my Mid Range car.

Car was originally sold with 260 range.
Sometime in January they increased the range to 264 with the 2018.50.6 update.
Car held the updated range through another update (2019.5.15)
Shortly after the car updated to 2019.8.3 it was showing 257-258 at 100% ~6 mile drop.

View attachment 399004
My mid range (built Nov, 2018) has exactly same range drop after software update. Not sure what's going on, but if there's really a problem with the battery so that it can't provide a range as long as advertised, shouldn't Tesla explain to us why we're seeing a sudden battery degradation after only six months of ownership. We paid $11K more than the standard range to get additional 44 miles of range, but a lot of mid range owners start seeing 10+ mile battery degradation within first six months. It's quite disappointing that Tesla only speaks out loud when they "figure out" a way to increase the range.
 

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