… Aren’t devices designed to only charge the battery to 90% (and report that as 100%), because actually changing a battery to 100% is pretty harmful for it?
You’re thinking of cars, industry and others that have high value batteries.
Power tools, smartphones etc charge to the maximum 4.2V/cell, sometimes even 4.3V (some chemistries safely allow it) because the average person just wants the maximum runtime and will replace the equipment before the battery degrades significantly.
Yeah give your phone a 20% battery handicap out of the box because of your battery degredation paranoia. Dumbest shit ever.
I hear the same argument about EVs, where many charge to 80%. Sometimes you need that extra juice, and by all means use it. Other times you’re only going to the grocery store, or sitting at your desk all day, and you can stay plugged in and you don’t really need that 20%. It’s no real skin off your nose either way.
Then, years from now when you need as much energy as your battery can give, you haven’t lost it to degradation and you really haven’t lost much along the way.
I just charge my phone to full when it’s at like 20 and then unplug it when it’s done charging. Have had this phone for like 2 and a half years and I don’t have noticeable degradation, but it’s a flagship samsung phone so I know they typically have pretty good cells in them.
Why wait 10 years to get a 20% battery degradation when you can have it today!?
I very rarely need a full charge when I get a new phone. Battery rarely drops under 50% unless it’s a heavy use day. However, that same phone 3 years later will be causing me issues because the battery doesn’t last through the day.
I would happily trade off 20% max battery in the first few years, to get a healthier battery 4 years down the line.
It’s not paranoia, it’s an issue of how Li-ion batteries work.
Literally. It even extends to other Lithium based chemistries too, like LiFePo4.
It’s not like this information is hiding either - ask a battery manufacturer/distributor for a Li-ion cell’s charge cycle data, what you’ll find is most manufacturers only guarantee 300-500 cycles before the battery has lost 80% of its usable capacity at 100% DoD and charging to the 100% SoC voltage. Decreasing just the maximum SoC to 90% brings massive battery longevity gains, where estimated cycles increase to 1000 (and beyond in some cases), while still retaining over 80% of the battery’s usable capacity.
All my personal devices that I’ve checked sadly target 100% SoC voltage and charge rate, without regard for the longevity of the battery. Just seems almost like they’ve just punched in the numbers from the “ABSOLUTE MAX RATINGS” part of the datasheet and called it a day.
It’s a little disappointing that a lot of people are under the belief that their product has been designed to last as long as it can, when in most cases this intentionally or accidentally isn’t the case right now, in industries outside of backup power and EVs
There used to be a magisk module that would charge the battery intelligently and stop before b Full charge but I don’t think it exists anymore sadly, or at least I haven’t been able to find it
I see that features in phones that I’ve used within the past 5 years. Isn’t it a standard feature?
No I’m pretty sure it’s not, I’ve used about 5 different phones on the last 5 years and one iPhone and I’ve never seen it on by default
But is the option available on every phone?
No I’m also pretty sure it’s not, thats something I would have checked for on each. I’m pretty sure this is just a Samsung thing
That is ACC, still alive and kicking. Here is a gui front end for it, you can get it from fdroid or GitHub https://github.com/MatteCarra/AccA
On Samsung phones it’s just an option in the settings.
Yup. Called “protect battery”.
Here’s my headline: Why obsessing over battery degradation is unhealthy and you should just do whatever is easiest for you
Agreed. If you’re a device maker and you haven’t considered the possibility of your users plugging in their devices for long periods of time in your design, then i feel that’s on you to improve your product.
“hey here is a way to increase the life of your battery by possibly 400%.”
“OMG! Why are you obsessing over this!”
Seriously how dare they try to help us and educate us!
the 400% figure is extremely misleading and based on old assumptions and old battery tech.
Also it you’re not keeping the phone for 20 years then it doesn’t make sense to calculate “total electrons” over the absolute entirety of the battery “life”.
I have enabled the option to limit charging to 85% on my Samsung, and last weekend I needed it to last for 2 days so I charged it to 100%. Easily made it. It’s nice to know you have that 100% when you need it .
I plug all my devices directly into the power line pole outside; everything charges to 75000%
Before spontaneously combusting
I’m capped at 80 for my phone and car.
For my phone, I’ll have my previous phone to compare to regarding longevity. Don’t really have anything to compare to car wise though.
I live in earthquake, volcano, and tsunami territory, so I think I’ll keep charging to 100% for now.
When I lived in the US and went through a hurricane, we had no power for almost 2 weeks and that stuck with me.
Sure, but if you treat your battery poorly you’re actually going to have less uptime in a natural disaster.
Long term, keeping your phone at 80% and having battery backups charged is going to be your best bet, assuming having having said battery backups is reasonable for you. It won’t take long for your 100% to suddenly be what 80% was when the phone was new.
If/when a situation happens where you need it, you can charge up to 100% no problem off the backups.
Well this applies to anything with a lipo/ion battery. If you charge your backup battery pack to 100% then store it, it’s very probably you’ll end up having a drained and fully dead battery when you need it.
Wonder if there are any battery packs designed for long term storage. They could hold 100%(4.2v or whatever) but would internally discharge slowly down to 80% then stop. I bet those huge batteries YouTubers use don’t even have that level of BMS. It’s trivial software but planned obsolescence that eco friendly capitalist companies would never do.
Here I am with 5 year old RC 5k cycle lipos that still have at least 80% of their manufacturing capacity.
Obviously that’ll be true with battery packs too. They’re also significantly cheaper, so it’s usually fairly reasonable to have multiple and them being at 50% capacity doesn’t matter nearly as much.
That’s correct, I agree with you.
That requires this knowledge of how batteries work. Saying keep a battery pack and your phone at 100% could leave people in a situation worse than if they just used the battery manager to stop their phone at 85%. 99% of people will plug their battery pack in until it’s full, stash it wherever they decide for emergencies, and will find a dead pack when they need it.
Depends who you ask. To manufacturers it’s a brilliant idea. It’s not a mystery that no electrical engineer knows that Li-Ion batteries don’t like to be fully charged. It’s just that manufacturers realized that charging 100% means you battery will die at around 2 year mark or 600-1000 charge cycles and that will be enough push for some people to buy a new device while at the same time your device seems to last longer on a single charge. Charging to 80% or 85% significantly extends life span of a battery. At that point chemistry almost doesn’t degrade.
And it’s not just with mobile devices and batteries that this is happening. Engineering with a plan to fail at specific time has become a precise science. Making something that will last forever is not that difficult, just not lucrative to them. Take for example LED lights. Manufacturer states 50k hours at 3.1V for white LED. Reduce that voltage down to 2.5V and you have basically made it infinite but it glows less, so to compensate you’d have to add more LEDs and that hits their income. Big Clive has a great video on the subject.
I don’t know, I have a bunch of years old Sony Konion vtc5 and vtc6 18650s, they’re constantly loaded and drained, I guess some have thousands of cycles. Of course, they’re not new anymore, but even my oldest ones, 7 years plus, are ok. They still give 34 ampere for quite some time, so no problems here. Got some even older no-name ones in akku packs, 10 years old, not so many cycles, no problems there either. Maybe because I never charged them quickly and with adaptive voltage?!?
There are 18650 batteries with protection circuit and without. It’s basically over-charge, under-charge and high temperature protection. More info. When charging any battery higher voltage means faster charge and it’s usually not a problem. What is a problem is heat generated. If you can’t dissipate heat fast enough, then you have a potential problem. Slower charging is always safer.
And all charging processes are adaptive voltage to a degree. Say you are charging 18650. Your charger will start with target voltage and constant current at 500mA, and watch the voltage in the battery raise. Once voltage reaches target it will remain constant but charge current will slowly drop. Once there’s no current going in, battery is full at that voltage level. Some chargers will push more current in, some will try higher voltage initially then switch to target voltage. Higher current can be a problem due to chemistry stability and heat but higher voltage should generally be safe. You can even revive some of the old batteries that no longer have any charge by shocking them with higher voltage shortly.
Also, good charger matters a lot.
This should not only result in government regulation where artificial battery killing is prohibited, it should result it jailing execs who decided this was a good idea.
I know plenty of devices will stop charging when the battery is optimal and just say it’s at 100% even though it’s 80.
Samsung has a setting for 85%, i know my phone only charging to 85% does not get as hot.
For android users, we can easily set notifications if battery level reach certain range by using apps like Tasker. Before this I set it for full charge. Change it to above 80% just now.
Samsung straight up has battery protection option which doesn’t allow it to charge above 85%.
Thank you for the great tip. I have turned this on.
Nice. But I don’t use Samsung. Used to but no more.
Am assuming it will drip to other manufacturers pretty fast. I think Motorola already has it.
I thought it was available in every brand already.
It exists in OnePlus, Oppo and Assus.
I wouldn’t be surprised. Hardware should already be there since Android supports stopping charge when battery is too hot. Adding software feature to stop charge at certain percentage is not that difficult.
I do this myself. I have mine set to 81% as the max and get a notification when it hits that level and then I get another notification when it hits 30% so I can plug it in.
Degraded battery life is rarely the thing that tanks a device for me (sure, it degrades, but it’s rarely the reason I replace it). I mean it’s great to know about this, but the last four phones I’ve replaced have been because (a) my old phone didn’t work on my new network, (b) my camera failed, © my chipset wasn’t up to the task of the most recent OS update, and (d) there was a fundamental flaw in my handset and the manufacturer offered a $50 upgrade to their newer model with trade.
Actually, thinking about it, a and b might be switched, but the point stands: it’s probably been twenty years since battery life was the reason I upgraded (from a flip phone to another flip phone, iirc).
Damn, some of you must have pretty chill lives if paying attention to what level your battery charge is at DAILY is something you want to add to your plates. I mean sure, if there was a setting that allowed you to have the phone automatically cut charging at 80% this might be worth thinking about. But when I charge my phone its during times when I dont have to think about it (Aka 90% of the time, when I’m asleep)
My phone has exactly this (oneplus 9 pro) but it works only when there is a full moon and the next Friday is the thirteen’s day of the month, plus some other unknown requirements
I’ve a one plus Nord 2 5g and it has optimised charging at night but it doesn’t come on every night I charge it and it does feel like there’s some arcane shit needed for it to work at times.
Samsung has this option, called Battery Protect I think. There’s also the Accubattery app which will set an alarm to go off once it reaches 80 pct. I’m with you though, unless the phone itself shuts off charging, it’s too much to manage even with an alarm.
S23 Ultra: Protect Battery - 85 percent toggle
I tried it before but my anxiety was always going . Thinking to try again.
I’ve stopped charging my phone overnight which I typically advise people against but also keep a charger at my desk. My phone actually has a battery saver setting that cuts charging at 85%.
Overnight is literally the easiest and most natural slot to do so. Whether or not its most optimal is not whats important, I’ll just seek out brands that aknowledge this reality and build their hardware and software around this
True, of course the simplest and easiest solution is the one that takes the least amount of thinking and effort.
My only issue is there are brands that try to build around this but it’s incredibly difficult. I understand iPhones have some kind of smart charging that’s supposed to charge slowly but stop until it learns when it thinks you’ll need it and finish charging just before then. However, that relies on consistent data and consistent routine and I would think that could potentially be quite inaccurate if you have a more inconsistent routine. I don’t think I’ve seen a better implementation yet unfortunately.
It’s just become second nature to me to watch for and charge my phone so certain times. I feel like that’s just a part of owning a mobile device.
Yeah, thats kind of my point. Plugging your phone in every night when you go to bed is a pretty natural and low thought way of charging any electronic device
What kind of phone do you have. Samsing, Apple and Pixel all have solutions.
The used prixel I got recently automatically only charges to 80% if an alarm is set, then charges the rest of the way to hit 100% when the alarm goes off.
My pixel (5a) only does adaptive charging if your alarm is set for the A.M. If you’re second or third shift, it doesn’t even try. There’s no way to turn it on even in developer options. It was a pretty big wtf when I figured that one out.
Its more I’m lazy. I’m on a ROG Phone 3, and as a gaming phone it probably has that feature. I’m moreso just arguing that if this is still an issue batteries face, tech should address it and fin solutions for how to get around the most common form of charging which is plugging it in and doing something else, which inherently means you ARENT watching what charge its at and have little control over when it stops charging
My samsung n20 ultra has the 85% charge option built in and I’ve always used it to keep my battery good. Back when it was easier to use custom roms in the 2010-2014 Era there was a lost of them that had custom “stop charging options” like it.
I also have fast/ultra fast charging disabled. If you don’t need to quickly charge your phone, it’s something else you should avoid.
For steam deck owners it gets a bit more complicated. SD has pass through charging, so once the battery is fully charged and also while it is plugged in, you aren’t powering it through the battery like cell phones and most laptops do. It’s just running off the USB c power, so if you usually play while plugged in, you aren’t cycling the battery, but you are having to allow it to fully charge.
SD has pass through charging, so once the battery is fully charged and also while it is plugged in, you aren’t powering it through the battery like cell phones and most laptops do.
That’s how nearly all modern devices work. Li-Ion can’t be charged and discharged simultaneously. There is circuitry to split the power between the battery and the device when it’s being charged.
Cheaper devices will just stop charging when you use them or they won’t work at all when plugged in.
This is flat out not true for most phones. Most phones will charge to 100% and continously charge/discharge if still plugged in. Over the last couple years there’s been some phones that will allow pass through/bypass charging. Iphones don’t do it at all. Only some android phones.
If it shouldn’t be charged above 80%, then make 80% the new 100%. “But this one goes to 11”
They already did. The percentage range on your phone’s battery display is basically a usable range rather than an absolute range. The article talks about phone manufacturers making changes to their charging systems to optimize battery function, but the headline bit about not charging past a certain point has been taken into account by Android and iOS for ages.
Very few android phones actually have this feature, most manufacturers strip it
A lot of charging circuits and battery designs already do this transparently.
Yes. Batteries are bags of chemicals. They don’t really have percentages. Where you decide 100% is is somewhat arbitrary and up to the battery management.
What the system shows the user may be even a completely different number and there may be software adjustable values.
It’s inherently a made up number and a manufacturer can decide to be more brutal or more sparing in how they treat the chemicals.
