Keep in mind that battery degradation differs depending on the cell chemistry, 
construction details etc. For example, data shows that battery degradation on 
older Tesla 3s was highest for the first 50K miles, then tended to level out. 
But current generation Tesla Model S and X have much less cobalt in the 
battery, and anecdotal evidence from many of us with cars around 100K miles 
shows that the battery degradation continues at about the same rate, without 
any obvious leveling out. 

Kevin 
2022 Tesla MS with 95K miles

Sent from my iPhone

> On Aug 31, 2025, at 19:29, Bobby Keeland via EV <[email protected]> wrote:
> 
> WOW, that degradation increases at anything over 55% is not good news.
> Perhaps I have to drop down to 70% or maybe even 60%. I’m sure glad that I
> got a long range battery pack this time.
> And, yes I might want to charge to 100% about 4 times per year.
> 
> Bobby Keeland
> Arnaudville, Louisiana
> 
>> On Sun, Aug 31, 2025 at 5:19 PM EV List Lackey via EV <[email protected]>
>> wrote:
>> 
>>> On 31 Aug 2025 at 15:32, Bobby Keeland via EV wrote:
>>> 
>>> For my 2019 Tesla M3 I only charged to 100% two times over a six year
>>> period. all other charges were to a max of 80%. I traded my Tesla in on
>> a new
>>> 2025 Hyundai Ioniq 5, and I plan to treat it mostly the same
>> 
>> Similar to our scheme, though I'd prefer to hit 100% more often than
>> that.
>> I've read that a 100% charge gives the BMS a chance to balance the cells
>> and
>> calibrate the charge meter or "guessometer."
>> 
>> Lately, we've been trying to stay in the 20-55% range.  It was 20-70% for
>> a
>> while, but I've recently seen data showing that depreciation accelerates
>> quickly above 55%.
>> 
>> We charge to 100% the night before we leave on a trip that we expect to
>> use
>> something close to 40%.
>> 
>> I guess that using such a narrow SOC range would be more of a challenge
>> with
>> an EV that had limited range, but most of today's EVs have plenty.
>> 
>> David Roden, EVDL moderator & general lackey
>> 
>> To reach me, don't reply to this message; I won't get it.  Use my
>> offlist address here : http://evdl.org/help/index.html#supt
>> 
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