On Wed, 2026-01-14 at 08:43 +1100, Stephen Morris wrote:
Just some info on this, my wife has an ASUS Vivobook where ASUS
provided a tool that by default only charges the battery to 80% under
Windows 11. I think the tool will allow charging to more than 80% but
it does that by default.
I still question the notion that this is a good idea. If you do not
fully charge your battery it doesn't last as long, so you end up
charging it more often. *That* (how often it's charged) is not good
for battery life. And it's also a pain for the user, in that your
device may not run for as long as you need it to. And that's certainly
a case for some devices like phones, where you end having to recharge
it during the day, rather than having one charge last for the entire
day, or longer.
Information being supplied on the methodology for the 80% charging is it
make your battery last longer, particularly with phones where they say
your battery will last longer if you only 80% charge it and don't let it
get below 10% charged before recharging it. This is based on the ground
that charging to 100% and letting your batter get flat destroys your
batter life.
For example, my phone's 7 years old, with a sealed-in battery. I've
never done that 80% thing, and always allowed it to fast charge (which
is something it only actually does with a very empty battery - the
charging once it fills up beyond a certain point is slow charging). It
has done well for everything but the last year, before that lasting the
whole day or several (when it's mostly idle being ignored by me) only
suffering, recently, from being charged again and again, thanks to my
computer being tethered to it for the internet (it charges, runs down a
bit, charges, etc). There doesn't seem to be any smarts that when
running from external power it should charge the battery, stop, then
stop using the battery for power and run solely from the external
supply.
Likewise, my laptop's battery suffered from being operated most of the
time while plugged into the mains. I don't think I got three years out
of it before it went totally kaput. It was getting really bad, to the
point where the battery only lasted long enough to unplug, move to a
different spot, then plug back in again. Then I made the mistake of
letting the laptop's BIOS firmware do a battery recalibration, and it
completely killed it instantly.
I'd only go on a battery preserving mission if your battery is sealed
in and hard to swap. And even then I really do not believe the fad.
Go for maximum personal convenience.
Most things do so-called smart charging. They only do high-current
charging on a very flat battery to bring things back to being somewhat
usable quickly. They reduce charging current beyond a certain point,
which they've determined through supposedly expert electronics
engineering, to finish charging more slowly. And thermal monitoring is
involved as another hold back against overdoing things while charging.
My background is in electronics, by the way.
My phone is around 3 to 4 years old in terms of that is how long I have
had the phone, not its actual age, and that phone has a usb-c charge
port. If the cable and charger are usb-c at both ends the phone will
charge from empty to full in around 1 hr 15 minutes as estimated by the
phone (which is what the phone calls fast charging) but if the cable and
charger has usb-a at one end the charging time as displayed by the phone
goes up to over 3 hours. The phone my wife has, which is more recent
that mine but is the same brand, operates exactly the same way. The
other thing that is specified as destroying battery life is putting the
phone on to charge and leaving it on overnight.
The other issue I've noticed with the phone is if I'm in the office, we
have to plug our laptops into docking stations with usb-c cables
provided to power the laptops, and, if I plug my phone into that usb-c
cable it will not charge my phone, the phone doesn't even know the power
cable is connected.
regards,
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VERSION:4.0
N:Morris;Stephen;;;
FN:Stephen Morris
EMAIL;PREF=1;TYPE=home:[email protected]
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