I remember reading a couple of years ago that it is bad for one's mobile phone to charge it to 100% and have it below 30%… I tried to keep my phone within that range and the battery lasted for about 3 years, which is average.
I wonder if it is still valid for new phones? Thanks.
I think that was true for older lithium batteries but not for ones made within the last 5 or so years.
5G causes corona?
And the covaids flattens your battery?
It is harmful enough that my Google Pixel 5a charging slows right down after 80% because it recognises that I will mostly be sleeping and won't need it until the morning.
Very clever.
My take? Just do whatever's convenient for you.
It is harmful enough that my Google Pixel 5a charging slows right down after 80% because it recognises that I will mostly be sleeping and won't need it until the morning.
A) You don't have a pixel 5a, it doesn't exist
B) That's how lithium batteries charge. They charge at constant current until rated max voltage, then constant voltage at progressively lower current after that point.
4a :)
All battery types have different characteristic as you know.
If ignoring storage charge etc since it's a phone we're talking every day charging and use. Lipo batteries hate to be discharged and love to be charged, often deep discharges are not good for the battery health (if you're wanting to maximise battery life span).
Charging to 100% should be perfectly fine, charging below 30% will likely shorten battery life.
Some older battery chemistry requires deep discharges and many often think this also applies to lipo batteries - my research (and anecdotal evidence) suggests this is not the case for lipo.
As others have implied/suggested, lipo also like a nice slow charge (for extended battery life) especially for the latter part of the charge. Most phones have intelligent charging systems that mostly manage this for you.
Personally I don't fuss too much, I use my phone during the day and charge it over night. My phones typically last over 5 years with no battery issue (phones become out dated before I have battery issues).
If it's getting really low (30 - 15% or what not) I get it on charge as soon as I can and charge it fully before disconnecting.
I wish I could say the same. My last phone was the OG Pixel and I was only able to use it until 2019. In my case, the battery was only lasting 4.5 hours with less than 1 hour of screen time. It was still working perfectly fine for me, except for it's battery life. Unfortunately, the price to replace my battery was enough for me to consider buying a new phone with all the concomitant bells and whistles.
So far, my current Pixel 3a still has 98% of it's stated capacity, but I've hardly ever charged it about 80%. Crossing fingers that that good run continues.
I saw this in a movie about a bus that had to SPEED around a city, keeping its SPEED over 80, and if its SPEED dropped below 30, it would explode! I think it was called, 'The Bus That Couldn't Slow Down'.
Starring John Wick.
Excellent!
Sounds bogus.
Yes for minimum wear and tear you basically never charge it past 90% and keep charge sessions in small chunks like 40% at a time.
Most damage is done by heat so charging with a slow charger is best.
My Samsung tablet has a feature which sets the charging threshold to 85 percent (i.e. it is never fully charged). Modern laptops also have a charging threshold setting too that you can set to prolong it's lifespan and reduce battery wear.
https://www.youtube.com/watch?v=AF2O4l1JprI
The strategy of keeping your phone at a charge level of >30% and <80% still applies. To my knowledge, the type of batteries we are using today for mobiles is still the good old Li-Po and we're not about to change it anytime soon because there hasn't been a suitable (or affordable) replacement for it.
I think it's actually 20%-80% for "zero wear".
And the minimum of 10%-90% for "reduced wear".
Certain consumer products come with this protection built-in.
For instance, in extreme cases you might have a 5000mAh installed, but the device will show 0% and shut-down when the capacity hits 1000mAh. Also it will show 100% and stop-charging when the capacity hits 4000mAh. Effectively giving you only 3000mAh of battery use, but preserving the battery so that it can last 10 years (or more). A more conservative scenario; when 5000mAh can be used between 500mAh-to-4500mAh, giving you 4000mAh of capacity to use, in which case the battery is supposed to last over 3 years.
When it comes to phone, neither above case is prevalent.
Temperature is a big factor.
Cold or freezing temperatures don't have much negative impact (besides reduced voltage/capacity) as it is all temporarily. However, sudden temperature changes does wear it out. Example, dropping from 15'C down to -5'C within ten minutes. Whereas heat does wear out most lithium batteries. Anything above 50'C usually starts the process. And extreme temperatures can destabilise some batteries, to the point of explosion.
With that said, here is the current state of affairs…
Team A: Human Beings, Sony, CAT, versus
Team B: Apple, Google, Samsung, LG, Nokia, Blackberry, ASUS, Motorola/Lenovo, Alcatel/ZTE, Huawei/Honor, Xiaomi/Redmi, OnePlus/Oppo/Vivo/Realme etc etc
Why?
It all comes down to battery health and pro-consumer choices.
Pro-consumer choices are about having thicker phones, higher capacities, better quality cells, sturdier housing, no super-fast-charging, no Wireless Charging, better device thermals, increased software efficiency, easy serviceability, and power bypass system.
I keep/use my phones for 2-3 years and have had no probems with battery life. Still like new.
I just charge them when I feel like it… 5% .. 30% remaining. Often I leave it on charge overnight.
No need to sweat over it. Just charge it when it suits you to do so.
Last two phones were Xiaomi's btw.
Running it lower is more dangerous than keeping it at 100% because modern CPU will stop the charging circuit at around 80% of the actual lithium battery capacity.
You need to root to get more capacity for some models.
EDIT: See Kangal's excellent analysis above.
I have an iPhone 6 and regularly drain the battery to 5%, and charge it to 100% every night, leaving it on charge over night. The battery health shows as being 92%.