Maximizing battery range all the time!

Maximizing battery range all the time!

So here is a scenario. The battery has a warranty of 8 years unlimited miles (S85), and Tesla suggests to charge it 80 percent or close to it, to preserve battery life,
This way, after 10 years or so, you might have to replace it, out of warranty.

However, by maximizing the charge to the fullest every time, chances are the battery might be needing a change sooner, like in 6 years, which would mean a free warranty replacement.

I think i might go this route. Warranty is warranty right?


ghillair | 18 janvier 2014

Follow Tesla's advice and the battery might last 15 - 20 years. Do it your way and replace the battery in 10 or 12 years.

Now who wins??

dramingly | 18 janvier 2014

Gaming the system much? What if you last 8 years and a day? Remember, the definition of battery failing is not really defined.

tes-s | 18 janvier 2014

Maybe just use the car and not worry about it? Standard charge normally, and range charge when needed?

Don't expect a new battery under warranty - probably a reconditioned battery that meets the minimum specs.

Jewsh | 18 janvier 2014

This is not advised. Lithium ion batteries should be stored at ~40% charge, and daily use should not go beyond the 90% SoC Tesla recommends.

As others have pointed out, Tesla guarantees nothing in terms of the battery's capacity despite the 8yr/Unlimited km warranty. If your battery holds 5kW at the end of 8 yrs because you abused it, it's Tesla's prerogative to wish you all the best and send you away. Don't abuse the warranty.

LMB | 18 janvier 2014

(LMB spouse)

Also, Tesla knows when you've been bad or good, so...

Elon has repeatedly said "unless the owner tries to deliberately destroy the battery."

AmpedUP | 18 janvier 2014

Grey, the threads about Tesla service suggesting that one "balance" the pack by charging to 100 percent for days a time suggests strongly to me that 100 percent is not actually 100 percent. Just as Tesla protects the car from being discharged to zero, it does the same thing at the top range. I'm willing to bet that "100" is actually "97" and that one could do that for years at a time and still have range within warranty guidelines.

Olof | 18 janvier 2014

I guess we are driving fancy cars like these mostly because it is fun and we feel good about ourselves. At least that is true for the Tesla owners I have met.

Cheating or taking advantage of somebody else (Tesla in this case) makes one feel bad and not sleep well.
So if one gets a new battery after 8 years and feels bad when everything is said and done, what was the purpose of buying the car in the first place?

Thomas N. | 18 janvier 2014

I just drive it and have fun.

mdemetri | 18 janvier 2014

@Grey - Not a good plan on multiple fronts.

First, Tesla does not warranty the battery for normal degradation. Importantly, they do not define what normal degradation is, so this at Tesla's discretion. Some have heard 70% bandied about, but there is no definitive number from Tesla. So the likelihood of them replacing your battery under warrenty with this abuse seems unlikely.

Second, even if they eventually agree to replace the battery, you will have still years of limited range to deal with. This is because most of the degradation happens quickly and then slows down. For example with a decline between 20-30%, you would be down to a max range of 185-212 for a 85kwh pack. Why would you want to risk limiting your cars range for years?

judimasters | 18 janvier 2014

@ Jewsh You say 40% is optimal? Why do I hear other higher numbers? Can anyone really tell me what we are supposed to do with the battery?

Mathew98 | 18 janvier 2014

40-55% charge is optimum for long term storage only.

For daily use up to 90% charge is recommended.

For road trip 100% range charge is fine as long as the battery does not stay at 100% for more than a few hours. That is why full charge at supercharger is fine. Owners will continue driving within minutes of a full charge at SC.

Mark K | 18 janvier 2014

Is there really a thread about how to squeeze the good guys?

Is the objective to trick Tesla out of their earnings for the hard work and sacrifice that brings us this blessing?

Will force-charging the car make driving it any better, or just deliberately hurt the battery and the company?

Do you really think bogus claims don't cost everyone else?

There is something fundamentally wrong with this picture.

J.T. | 19 janvier 2014

@Mark K It's the same people who steal cable, eat grapes while they're shopping, take too many napkins from Starbucks, break things in Supermarkets and just leave them on the floor, cheat on their taxes, lie to their insurance companies and take all the toiletries from the hotel room when they checkout.

All of these acts raise prices for the rest of us. But, our society has determined that the man is bad and if you stick it to him you're doing good. No one realizes that the man then just sticks it to the rest of us.

drp | 19 janvier 2014

Tesla has been very, very, good to me so why would I want to be anything other than very, very good to them?

Tâm | 19 janvier 2014

Tesla is confident that your battery will last 8 years with unlimited miles so I am sure it has done the maths.

I am no mathematician so if you can calculate how many miles that is if your car continuously supercharged and run on the road to rack up all the outrageous miles and cell life cycles.

I assume Tesla also did a math of your plan of maxcharging as Much as possible for 8 years.

It is a profitable business model that you think you can beat it.

It is pretty much principle of a heart attack hamburger restaurant encourage you to eat for free unlimited if you have met an obese weight. And those customers did get a heart attack.

The business is still booming but the risks are yours. In this case, 8 years is not a problem. It is 8 years and 1 day that will come back and haunt you.

It is the same way that if a TV is guaranteed for 8 years, it does not mean it will die at 8 years and 1 day but of course, you can abuse it to make sure it will be so.

Roamer@AZ USA | 19 janvier 2014

+++1 jtodman.

If you are that worried about scamming the battery warranty you probably should not be spending your money on a Tesla.

AmpedRealtor | 19 janvier 2014

You could also run over a well placed trailer hitch and hope that your battery catches on fire. Elon will cover you in that event. I believe this is what everyone with an "A" version battery is planning on doing. Just kidding! But still...

AmpedRealtor | 19 janvier 2014

@ jtodtman - I've been known to taste a grape or two before committing to the bunch. Is that the same thing? It's such a fine line.

Roamer@AZ USA | 19 janvier 2014


It's sort of like the guy I watched at Home Depot the other day. While I was waiting to ask a question another customer had the employee open up the package so he could see the contents. Nothing wrong there. Then when satisfied he reached for an unopened box and put it in his cart. The employee said don't you want this one and the customer replied, "no that ones been opened". We live in a self entitled world.

J.T. | 19 janvier 2014

@Amped We all do it, but the better ones among us at least know what we're doing is wrong. The others feel if they get away with it, it's right.

NKYTA | 19 janvier 2014

+1 @jt

ChopinBlues | 20 janvier 2014

Interesting that someone here mentioned an 80% figure to use for your daily charging. The 'delivery specialist' who checked me out said to simply use 85% all the time, while the manual gives a range of 50-90%. Is there really an optimum number to use, or does it matter? On a typical weekday, I barely drive more than a few miles, and I suspect I may not want to charge it back up every day in that scenario.

Car t man | 20 janvier 2014

He tried to make it simple for you but you had to go and complicate again didn't you? Charge to 80% when short drives are expected and more, up to 95% when you expect something might turn up and 100% when you know something will come up..