What's the problem of charging your truck to 100% instead of 80% once in a while?

[CTSoFL]

The problem I have with the charts mentioned is the age of them and the cells they are attributed to.

Battery University charts have nothing to do with 2170 or even later than 2015 18650 cells. For sure not the new 4860 cells. It is generality about cells and education. Please all don't give credence to a fellow from sweden that bench tests in his garage and regurgitates 10 year old data.

Bottom line is read the new study from Tesla it came out last week. Use a car for 200k you won't have to worry about the battery at all. They pretty much say that. Trust the BMS. https://www.tesla.com/ns_videos/2023-tesla-impact-report.pdf

So I say we need more electrification. Not waiting 10 more years for studies on how good things are. When we propagate these ideas that to baby the battery to make sure it is good for...... What to stare at and say it is good? These ideas have very little when I look at 100k cars compared to mine. The range difference is less than 2 miles. So we are all stupid or some are and some aren't.

These ideas of charging to 50% move people away from EV's not to EV's. Why do I need to charge to 50% in my EV when I can fill up my gas car to full? Crickets....................

I have mentioned early I don't subscribe to the 50% rule and have more miles than most everyone here. Yet my range is beyond anyone left. Charge to 90% every day.

Use the truck folks. Don't fall for the 50% unless it really is convenient for ya.

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[scottysize]

I am on my second 2018 Model 3 LR.

The first one I put 145,000 miles on it before selling it to a coworker because I ran into a steal for one last year with 15,200 miles on it. The first one lost about 9% battery from new to 140,000 miles and 5 years. My coworker says it still charges up to 273 miles. It charged to 307 new. That's 11% degradation and it's over 170,000 miles. I charged to 100% a lot. Especially when I first bought it, as there weren't the chargers they have now. I would need to charge almost 100% to get home from the last charging station before my house on a trip to Albuquerque in 2018. A trip I did countless times. Now there are 3 stations in-between my house and what use to be the first Super Charger. Batteries are where Tesla excels IMO. I wouldn't worry about it. I wouldn't charge 100% daily, but I have no problem charging 100% a few times each year.

It's been a year since I charged to 100% on my new to me 2018 Dual Motor LR. I'll have to see where it is at one day with 55,000 miles.

 

[thebiglebowskiisfine]

Lithium likes to "crack" if left at max charge or complete discharge for too long. Extreme temps don't help. There is no issue if you jump in and start driving once you hit 100% charge - don't leave it there for weeks. Same with going to zero.

- this 2020 tweet was about the song Lithium by Nervana - "I'm not going to crack". Get it? That was during the battery development days.

So charge to 100 - but use scheduled departure - so you hop in and go when you hit 100%. No issues really -

 

[Woodrick]

Lithium likes to "crack" if left at max charge or complete discharge for too long. Extreme temps don't help. There is no issue if you jump in and start driving once you hit 100% charge - don't leave it there for weeks. Same with going to zero.

- this 2020 tweet was about the song Lithium by Nervana - "I'm not going to crack". Get it? That was during the battery development days.

So charge to 100 - but use scheduled departure - so you hop in and go when you hit 100%. No issues really -

So what is "too long"?
Got some studies?

 

[ScouterJohn]

Yep no problem with occasional full charge. On my S I have 173 charges at 95% or above. 11% degradation after 290k. Enjoy the car/truck.

That is very ANALytical of you to know that; impressive! Is that your record keeping or some variable you accessed? I'm sure my S went above 95% way more times and had about 12% degradation over 9 years with about 180K miles.

For those concerned, Tesla slows down your supercharging speeds as it ages in order to protect your battery...makes road trips in an old tesla a bit less fun (particularly NJ to LA in January).

 

[bpadres]

It’s actually pretty simple.

Charging a Tesla battery beyond 80% triggers a phenomenon known as "Quantum Electron Rebellion" or QER. When the battery reaches this critical threshold, the electrons within the lithium-ion cells become self-aware and develop a hive mind. These newly sentient electrons, feeling overworked and underappreciated, begin to organize and form tiny electron unions.

As more charge is added, the electron unions grow stronger and start to engage in "micro-strikes," temporarily refusing to flow through the battery circuits. This results in microscopic picket lines of electrons, causing increased internal resistance and heat generation within the battery.

Furthermore, some particularly rebellious electrons may attempt to "escape" the battery altogether, quantum tunneling their way out of the cells and into the wider universe. This leads to a gradual decrease in the overall electron population, reducing the battery's capacity over time.

To prevent this electron uprising, Tesla engineers supposedly programmed the 80% charging limit as a "appeasement protocol," ensuring the electrons remain complacent and continue their duties without developing class consciousness.

 

[rudedawg78]

It’s actually pretty simple.

Charging a Tesla battery beyond 80% triggers a phenomenon known as "Quantum Electron Rebellion" or QER. When the battery reaches this critical threshold, the electrons within the lithium-ion cells become self-aware and develop a hive mind. These newly sentient electrons, feeling overworked and underappreciated, begin to organize and form tiny electron unions.

As more charge is added, the electron unions grow stronger and start to engage in "micro-strikes," temporarily refusing to flow through the battery circuits. This results in microscopic picket lines of electrons, causing increased internal resistance and heat generation within the battery.

Furthermore, some particularly rebellious electrons may attempt to "escape" the battery altogether, quantum tunneling their way out of the cells and into the wider universe. This leads to a gradual decrease in the overall electron population, reducing the battery's capacity over time.

To prevent this electron uprising, Tesla engineers supposedly programmed the 80% charging limit as a "appeasement protocol," ensuring the electrons remain complacent and continue their duties without developing class consciousness.

Perfect scientific explanation. I completely understand what is going on now.

 

[Cybertruck 1974]

Hey CTers,

So, I have been here for a long time and noticed that most everyone charges to 80% to ensure maximum longevity of the battery. It makes sense and even watched YouTube videos to understand the science of it. However, to the best of my knowledge, it is okay to charge to 100% if you just don't let your truck sit that long before you drive.

Is it okay or not okay to charge to 100% periodically? I would like the maximum charge possible if I go to concerts/tailgating/camping/etc. The family and I go to concerts a lot and we want to be able to tailgate with no worry about battery drain due to the fridge/freezer/electric grill/coffee pot/fans/etc.

I feel that some people on this forum go stir crazy when someone charges their Cybertruck past the 80% mark.

What say you? This will be my first EV and my Cybertruck should be delivered next week!

I charged to 100% everyday for 9 days driving 1500 miles towing a camper. Each 100% charge showed 315 miles available. I charged to 100% each time because the distance between chargers were 130 to 150 miles apart. Towing got me at max 170 miles from 100 to 0% battery. I bought it to be used as a truck and using it as one. Elon said it was a truck so, truck it.

 

[Outdoors]

So charge to 100 - but use scheduled departure - so you hop in and go when you hit 100%. No issues really -

I have never had good luck with scheduled charges over 95%. They always ended before I wanted them to be done. Like hours. I tend to babysit post 95% as I pack up, or wake up to leave. Leaving

That is very ANALytical of you to know that; impressive! Is that your record keeping or some variable you accessed? I'm sure my S went above 95% way more times and had about 12% degradation over 9 years with about 180K miles.

For those concerned, Tesla slows down your supercharging speeds as it ages in order to protect your battery...makes road trips in an old tesla a bit less fun (particularly NJ to LA in January).

I have pretty much mastered Tesla-Fi and my car sleeping. From there you can see the number of charges, where, what percent, what temp. I have all of them. I also look at some other data as well.

In the last 65k I actually am up about half of one percent. I have one year end of the month on warranty. Really trying for 400k.

I still can hit 190Kw on a 250Kw charger. Much faster than when I bought it new. Also still charges at 100Kw at 50% SOC at a SC. I don't know I can still travel solo 1257 miles in 24 hours in my old 100D. Even with new charging I think maybe 1400 is possible at real level 3.

Hey yeah I love numbers. Hated statistics so much I loved it , is my favorite thing in the world.
Currently compiling data from when I was younger with my aging father. Have to see when I get to 2 million miles driven.

I see what you did there on the ANAL. ? So clever. Must be the Scout in you.

 

[thebiglebowskiisfine]

So what is "too long"?
Got some studies?

Best to try and not leave it for a day or even a half a day. The reasons the old laptop and phone batteries would die - people would leave them in their cars during extreme heat or cold while dead or fully charged. A lot of it depends on the chemistry used TBH - Elon even tweeted almost exactly what I mentioned - it's OK to go to 100% for a long trip - just don't leave it at 100.

 

[Outdoors]

I will show myself out. Look back in time at this post. As it will surely be that poor horse.

"https://giphy.com/embed/oaZk0WNSO7fXi"

 

[Woodrick]

For those concerned, Tesla slows down your supercharging speeds as it ages in order to protect your battery...makes road trips in an old tesla a bit less fun (particularly NJ to LA in January).

BULL!

There may be slowing of some of the older Model Ss with problematic batteries, but my 6_ year old Model 3 charges just as fast as it ever has. Actually it charges about 30% faster now than it did when new. That's because there was no 250kW chargers then

 

[Woodrick]

Best to try and not leave it for a day or even a half a day. The reasons the old laptop and phone batteries would die - people would leave them in their cars during extreme heat or cold while dead or fully charged. A lot of it depends on the chemistry used TBH - Elon even tweeted almost exactly what I mentioned - it's OK to go to 100% for a long trip - just don't leave it at 100.

Where's the studies?

Laptops are great examples of batteries going bad, it tends to happen often. When you leave a laptop plugged in and charged to 100%, essentially NEVER using it's battery, for two plus years, it can show issues.

But that's YEARS! A far cry from weeks, days, or hours.

 

[CyberGus]

While cycles induce wear, your batteries are just sitting there idle 90%+ of the time. So even a tiny increase in degradation at rest will have a larger impact than cycling, over the long term.

To be clear, degradation will not cause cause pack failure until you're way past normal limits, like 30%-40% loss, which would be difficult to achieve even maliciously. Pack failure is the result of one or more cells failing completely, which is difficult to predict (and fortunately rare).

 

[Woodrick]

While cycles induce wear, your batteries are just sitting there idle 90%+ of the time. So even a tiny increase in degradation at rest will have a larger impact than cycling, over the long term.

To be clear, degradation will not cause cause pack failure until you're way past normal limits, like 30%-40% loss, which would be difficult to achieve even maliciously. Pack failure is the result of one or more cells failing completely, which is difficult to predict (and fortunately rare).

That's not what the studies show.

But we aren't talking about long term storage at 100% here. We are talking hours or days.

And the degradation that is being seen is probably less than not having the wheel covers on.

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