Got proof? I’ve not cracked open a phone for a while to see if the component labelling matches the interface, let alone tested capacity of an extracted battery directly.
Comment on Is Fast Charging Killing the Battery? A 2-Year Test on 40 Phones
SaraTonin@lemmy.world 22 hours agoHere’s a fun fact: phone manufacturers know this. So what they call “100%” is not actually 100%. Your phone will not charge your battery to full. Battery charging is already designed around this.
mjr@infosec.pub 22 hours ago
SaraTonin@lemmy.world 22 hours ago
rumba@lemmy.zip 13 hours ago
He’s not talking about 80/20 limits. he’s talking about material breakdown at extremes. Not all manufacturers spec in 80/20 limits. AFAIK, only Samsung actually lets you stop it completely at 80, the rest just try to let it sit no higher than 80 all night.
If they were saccrificing 40% of runtime to keep you from having to replace your battery, that would 100% be in the sales pitch.
And honestly, that article isn’t a great source of truth. A number of the statements in there are inaccurate or, at the very least, misleading.
Charging beyond 100% or below 0% is mostly BS. The proper max voltage of the battery is a physics thing, they are in equilibrium at 4.7 / cell. Picking at a low power limit is up to the manufacturer and their choice in power distribution circuitry. He asked the chemist if you could overcharge or overdischarge a battery and mistook that as an answer that it was feasible to overcharge/overdischarge them.
“Leaving a charger plugged in at the wall and turned on wastes energy False (well, maybe a tiny bit)” This is still true for many chargers, and calling it out as a little bit in his own arbitrary numbers is disingenuous.
“Batteries perform worse when they’re cold False (mostly)”
Rest assured, your C rating is wildly affected by temperature; he’s trying to again call it out as slight, which is making his own narrative.
“Powering off a device occasionally helps preserve battery life False”
The whole time your phone is on, you are charging or discharging. Those cycles wear on the battery any time you shut your phone off, you are in the least damaging mode for your battery, especially if it’s around 50% or so.
“Using an unofficial charger damages your phone True”
100% BS, using a crappy charger might damage your phone. Buying a quality 3rd party chager is no problem at all.
The author doesn’t appear to have a strong electronics background and he didn’t ask the right questions or fully understand the importat parts of the answers
“And if too much current is delivered to a battery, that could mean ripping out too many of those lithium ions and leading to the same kind of degradation you read about earlier. That’s not to say that all off-brand chargers will be this bad, Griffith notes, but you’re still probably better off sticking with an official model.” is not the same as “Using an unofficial charger damages your phone”
mjr@infosec.pub 20 hours ago
Article rests on one expert. That assistant professor’s publication list doesn’t seem to contain evidence about it, plus the quotes in the article don’t directly say it happens.
Maybe it does, but that article only seems to be guessing based on (admittedly reasonable) theory.
JackbyDev@programming.dev 9 hours ago
Source?
sugar_in_your_tea@sh.itjust.works 14 hours ago
That depends on the manufacturer, some do, some don’t. My phone has a setting to control the max charge, so I set it to 80% when I got it.
Predator@feddit.uk 12 hours ago
Yes, but that 100% is not really that. It has been programmed to display that percentage, when i reality its 80%.
sugar_in_your_tea@sh.itjust.works 12 hours ago
No, I’m saying that not all manufacturers have that limit, and it’s a relatively new setting (last few years). If you have an older phone or something not from the top few manufacturers, it might not have that feature.
BillBurBaggins@lemmy.world 11 hours ago
This is like spinal tap. Yeah but my phone charges to 110%. I don’t think you understood what they’re trying to say. Changing what 100% means isn’t a setting or “relatively new”