I always hear that it’s bad for lithium batteries to charge over 90% or over 90% so why is there no setting to stop charging after a certain threshold on my phone, kindle, pc or e-skate?
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Teslas also do this. There is your “daily” charge, which is like 80% of your max. You can choose to charge to 100% for “trips”, which gives you another 60 miles of range.
Interestingly, there was a problem recently with Teslas that was fixed with an OTA (over the air) update. If you don’t occasionally charge to full, you lose the ability to accurately determine how much charge you have. Cars were reaching 0% charge, when the car thought it had more charge. You have to charge to 100% occasionally (like once a month) to calibrate.
My phone, and previous phone had the option to stop charging at 85% on by default so I left them that way cause it worked for my usage. Last one was a Sony and current is Samsung so I imagine this is fairly prevalent already at least for phones.
I dunno the details of your devices so can’t comment on that. I can imagine maybe your devices just don’t have that option so why you’re asking. I know nothing about the laptop bit, as I use mine pretty much plugged in all the time. However it’s 4.5 years old and occasionally gets unplugged by cat or husband and it’s still hours before I notice because it says the battery is low, so either it’s managing limiting charge or it’s just a good battery.
I have a Kindle and charge it in between reading so it gets charged, I keep it between 30% and 80%ish but it’s hit 100% a few times. For me the Kindle charging really has to do with how often I read so I try to plan the charging accordingly.
Why would they make it easy to do this when they could just sell you another battery (Or lets face it, new phone) when yours depreciates because of this very reason.
My laptop is set to charge to only 60%, and I can set it to 80 or 100 if I need more life. As others have said, your displayed 100% very well might just be not actually 100% of the battery’s capacity.
We’ve got some tablets at work which are permanently plugged in. They went into “Battery protection mode” on their own and battery percentage is kept between 40% and 80%. They never charge all the way up.
I mean if your batter dies sooner then they can sell another phone it’s part of why removable batteries went away it’s along the lines of planned obsolescence
There is a sophisticated charging management unit for every lithium ion battery. Those chips handle all the things necessary to keep Li-ion cells happy. The percentages shown on screen are mostly fake guesstimates which only roughly correlate with the actual charging state of the cells.
The keyword here is **my** phone, kindle, pc, or e-skate.
Maybe your devices are secretly doing this in the background, or maybe they’re really not doing it at all. My phone from 2018 does it, as does my laptop from 2016. Most modern devices do, too. And even if there is no setting, maybe the manufacturer only uses 90% of the “full” battery capacity and calls that 100%.
What you see in the UI doesn’t necessarily match what’s actually happening in the device. It’s all just programmatic interpretation.
When you see 100% charged, that could just be 90% of the battery, but it’s 100% of what the device will let you charge it to.
Similarly, what a phone shows as 1/2/3/4/5 bars of signal doesn’t necessarily match what you might think it does. They just pick a signal level and set that as a threshold for a bar, and if you meet it, that’s what it shows you, but the range between the levels can be pretty diverse, and sometimes is even patched between versions. I know some phones have had complaints about always having poor signal, and the ‘fix’ was basically a software update lowering the threshold so that it showed more bars more often.
Most expensive devices usually give you the option to enable this setting.
Most cheaper electronics dont tho.
Might take them a few more years until its the default for everything
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