I often hear that you should keep Lion and Lithium Polymer batteries between 20 and 80% charged so as to not cause excessive stress thereon leading to the maximum charge capacity decreasing.
My question is: how can this be quantified? As in, after how much time charging to 100% and depleting to 0%, what would the new maximum charge be as a percentage of the original?
(If you wanted to know, this portable charger can fit in pockets by width and breadth, but may stick out with length depending on the pocket)

>>106015949 (OP)
It's going to depend on the exact battery, how fast it was charged / discharged, temperature, vibration, which house Saturn is in, ... 80/20 supposedly makes batteries last ~5x longer if every other factor is reasonable. They all go to 0% capacity eventually.

>>106015949 (OP)
>buy a new phone
>immediately have to throw away 40% of time between charges

>>106017080
I don’t get it.

>buy a new phone
>it becomes old phone
what the FUCK I thought this only happened with girls

>>106015949 (OP)
I don't have any data to quantify it, but my wife always leaves phones and laptops plugged in constantly, and the batteries have reliably ended up being fucked after just a couple of years. Got a macbook sitting in my drawer here with a swollen battery that I've been meaning to deal with

>>106017915
batteries always become fucked after 2 years of use, it's just that leaving batteries plugged in counts as use. heat accelerates this. offline battery storage is the solution

>>106017934
>offline battery storage

Basically, no 20/80 isn't worth it. Unplugging your device when it's fully charged isn't either (that's a misunderstanding stemming from primitive chargers).
If you can do without the charge capacity now, you can do without it later too. You're restricting yourself to 60% capacity, simulating a heavily worn battery. And then your battery will probably randomly crap out anyway.

>>106015949 (OP)
>how can this be quantified?
It can't. It varies between models of charge controller, batteries (even batch of same-model battery) and then in the end lithium battery decay is still random.
Consider, what even is "100%"? There is no universal "100%" between batteries. The charge controller measures a voltage, and decides "that's enough" as it has been configured, and it's a judgement of how much charge to get out of the battery and how much wear to accept.

>>106018182
if you need the last 20 percent you can just use it
and if you anticipate needing the first 20 percent you can full charge it
its not like you're forced into only 20-80 at all time always

>>106015949 (OP)
>how can this be quantified?
Cell's voltage and its specs, both of which virtually no external battery gives you.
>>106018182
this.

If you plan on storing a battery for a long time, make sure to have it charged around 75%, it will preserve its capacity better.

>>106015949 (OP)
In this example, cycles to get to 80% capacity remaining is 4000 when using the full charge range, 7000 for 85% max charging or 10000 for 75% max charging

>>106018209
That's a lot of tinkering that's not worth it. All so you can have 20% more capacity on your obsolete banged up phone in 3 years... That 20% is just convenience too, you could just charge it instead.

I should leave an exception to what I said though, it can be worth it to limit capacity for things like powerwalls or electric cars simply because those batteries will be $10k+ to replace, and the rest of the "device" wont be obsolete.

>>106018574
This. Considering and doing such autistic shit is not worth it in the long run when it will A crap out no matter what and B just charge it bro. Plus, you will most likely get a new phone before it craps out anyway (2-3 years). Even buying a new battery and replacing the old one is a better alternative than micro managing your charge levels for years kek, the money you spend will be nothing compared to the energy and nerves you'll put in the latter.

>>106018313
I personnally do 40% to 60%. My galaxy from 2016 still has 100% battery health.

>>106018574
>banged up obsolete phone in 3 years
gorilla nigger take

I just do 20% because low-volting batteries is far worse. If you only charge when necessary it shouldn't spend a lot of time in the 80-100% range anyway. Especially with newer phones only charging to 80% overnight.

>>106015949 (OP)
I tend to believe this, but I don't do it in practice. I value the time that I have on my phone because I commute to work, so I need a full battery. I won't buy a phone if it doesn't have at least 5,000 mAh. I'm spending my hard-earned money on a phone for the battery capacity primarily, and now you're telling me that I can only use 80% of that? That's ridiculous. I'll just buy a new phone if it ends up crapping out. Imagine if you bought a car and then somebody told you you can only fill up the gas tank, the three-fourths of the way, or the car is going to wear out faster. That's just stupid.

>>106015949 (OP)
It is true. Quantify it by destroying batteries

>>106017817
>charge to 80%
100-80=20
>discharge to 20%
20-0=20
20+20=40.
They sell you a phone touting it's 100 to 0 battery life and then expect you to only actually use 60% of that if you follow their recommendations. It's a scam.

>>106023369
By the time you're 18 you should know almost nothing is meant to run at the exact spec limit all the time.

>>106023657
I expect better than 60. If they need to reserve parts from use to make the battery reliable it shouldn't be the user's burden. It should be hidden and they should only be able to advertise based on what they want you to use.

>>106023657
That's been the exact opposite of my understanding for most things.
> Warning: Bungie cord supports up to 300lbs
> (Actually its rated for 400 but were playing it safe)
And it's seemed like this for most products.

>>106023862
Because there's personal injury liability angle you retarded ape. They're not going to incur a $100k liability for a $5 bungie cord. If your $30 phone battery dies that's just tough shit. $10k auto transmission can't actually tow 3k pounds? Nobody got hurt; tough shit. """2kW""" PSU killed your $5k GPU? Tough shit.

>>106017080
this
it makes sense for tablets and laptops since those sre used when charging is essily available so it doesn't matter as much
but for a phone? just use the damn thing

>>106026001
> By the time you're 18 you should know almost nothing is meant to run at the exact spec limit all the time.
> almost nothing
Nothing your saying is news to me. This statement, almost nothing, whether it was you that said it or someone else, is clearly wrong.

>>106027050
>almost
if you're going to have a 80 iq you have to learn to take the L

>>106027494
Anon, most things are meant to run at spec. Not almost nothing. That was the whole point of this exchange. Throwing rocks in glasses houses little guy.

>>106015949 (OP)
It's all completely random in my experience. I guess it comes down to how much defects are in your battery at manufacturing.
My 3 year old iPhone SE is at 99% health while my Macbook M4 Pro is at 91% after 7 months, trying my best to keep to the 80-20 rule.

>>106027844
False. If you spend half as much time learning about things as you did trying to be right you'd know better.

>>106027844
takes 2 seconds to realize thats not true lil gup

>>106015949 (OP)
I am the happiest anon since I discovered 2 samsung devices that lets me pause the battery charge at 80 -85 or 90% I dont have to babysit the charges anymore