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Highest mileage with original battery

henderrj

Member
Jun 16, 2014
984
809
Graham, WA, United States
I'm now north of 233 k mi on my original battery. still got somewhat less than 2 years on my battery warranty, maybe getting a little worried! What is the highest mileage on an original battery?

Screenshot_20210304-162842.png
 

Rocky_H

Well-Known Member
Feb 19, 2015
6,398
7,546
Boise, ID
Is it possible for you to provide cycle count?
I'm getting the feeling that you are confusing charging "events" with charging "cycles". Because the number of charging cycles is basically already provided in the statement you just quoted:
I'm now north of 233 k mi on my original battery.
The miles of use can be correlated very closely to the number of cycles, because a "cycle" is defined as a full capacity discharge and refill. So this was a 2014 S85, which had originally 265 rated miles. Scaling that by about 80%, you would get something like 212 real miles on the odometer per 265 EPA rated miles on the display. So take 233,000 divided by 212 real miles per charging cycle, and that's about 1,099 charge cycles. There is some estimating in there, but that's about how you calculate it.
 
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henderrj

Member
Jun 16, 2014
984
809
Graham, WA, United States
I'm getting the feeling that you are confusing charging "events" with charging "cycles". Because the number of charging cycles is basically already provided in the statement you just quoted:

The miles of use can be correlated very closely to the number of cycles, because a "cycle" is defined as a full capacity discharge and refill. So this was a 2014 S85, which had originally 265 rated miles. Scaling that by about 80%, you would get something like 212 real miles on the odometer per 265 EPA rated miles on the display. So take 233,000 divided by 212 real miles per charging cycle, and that's about 1,099 charge cycles. There is some estimating in there, but that's about how you calculate it.

Good points. But no one has answered my question. What is the highest mileage on an original battery out there. I wouldn't mind taking the record but I do want my new battery as well! (Hopefully not a rebuilt.)
 

Rocky_H

Well-Known Member
Feb 19, 2015
6,398
7,546
Boise, ID
Good points. But no one has answered my question. What is the highest mileage on an original battery out there. I wouldn't mind taking the record but I do want my new battery as well! (Hopefully not a rebuilt.)
I think that may be somewhat self-limiting to around 200 to 300 thousand miles, because of a hardware/software problem. The early ones like from Tesloop, which started to get really high mileage got into some kind of state where the car's software couldn't read them properly, and would start shutting down with like 50+ miles still showing, that was real energy still left. At the time, Tesla had not figured out the software fix for those older high mileage batteries, so they were just replacing them. Those vehicles went on to get to 400, 500 thousand miles and more, but not with original batteries.
 
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