A Tesla with a LFP Battery use 100% settings to reset the charging level counter.
This is used because the car has hard to measure the state of charge in the battery.
Charging full gives a fix point = 100% sure about having 100% state of charge.
With no full charges for long time there is a increasing uncertainty about what state of charge the battery has.
In these cases the car put more of the battery capacity as buffer below 0% on the screen, reducing the practical range we can drive.
Charge to 100% at least once a week makes sure that the most part of the available energy in the battery is usable.
Reading the manual is much better than reading charging tips on forums.
If you follow the very few and simple tips in the manual the battery will hold very long and the car will work fine. Theres no need for anything else.
The 80% or 90% being the best charging thing is a forum myth.
There is a possibility to reduce the degradation with about 50% if that is a goal.
This is used because the car has hard to measure the state of charge in the battery.
Charging full gives a fix point = 100% sure about having 100% state of charge.
With no full charges for long time there is a increasing uncertainty about what state of charge the battery has.
In these cases the car put more of the battery capacity as buffer below 0% on the screen, reducing the practical range we can drive.
Charge to 100% at least once a week makes sure that the most part of the available energy in the battery is usable.
Reading the manual is much better than reading charging tips on forums.
If you follow the very few and simple tips in the manual the battery will hold very long and the car will work fine. Theres no need for anything else.
The 80% or 90% being the best charging thing is a forum myth.
The lower the state of charge, the slower the battery degrade. So in principle the lowest charging setting that cover the needs for range until next charging session will be the best.
Also charging late (shortly before the drive), so the time at high SOC is reduced is good.
There is a possibility to reduce the degradation with about 50% if that is a goal.