Something is off with the link’s measurements. 3.7V is a li-ion cell’s nominal voltage, not its lower limit. Typical operating range is 3.0V - 4.2V. No battery chemistry I’m familiar with would have a lower cutoff as high as 3.7V.
Comment on Is Fast Charging Killing the Battery? A 2-Year Test on 40 Phones
frongt@lemmy.zip 3 weeks agoBest source I can find: …medium.com/how-i-realized-android-battery-percen…
3.7v is 0%, 4.2v is 100%. But a lithium battery can go higher and lower, it’s just that doing that can harm the battery, perhaps spectacularly. OEMs just narrow the voltage range to extend life. When you set a charge limit, it narrows that range further.
stealth_cookies@lemmy.ca 3 weeks ago
xep@discuss.online 3 weeks ago
You’ll find that based on 3.7 - 4.2 that most li-ion batteries are indeed charged from 0-100 and not 20-80 as you previously claimed. Manufacturers have no reason to overprovision consumer products that are made to be replaced in 5 years or so.
frongt@lemmy.zip 3 weeks ago
Yes, that’s what I said. You could go higher and lower, and it would be reasonable to do for a short-life device, but they reduce it to extend the life.