Comment on Is Fast Charging Killing the Battery? A 2-Year Test on 40 Phones
sugar_in_your_tea@sh.itjust.works 3 hours ago“The max” is the highest voltage the battery can safely store with reasonable losses, and “empty” is the lowest voltage the battery can safely charge from. Or something like that, I’m not a battery engineer. There’s surely a bit of buffer here since users will use it outside of ideal circumstances (ambient temperature, heat dissipation, etc).
Regardless, those numbers come from the battery manufacturer. I’m guessing phone manufacturers add some extra buffer given the properties of the phone (heat generated by electronics, heat dissipation of the case, etc).
None of that has anything to do with what I’m talking about.
The 20-80% range is on top of that and is based on efficiencies in battery tech. That’s the sweet spot of battery longevity, and some phone manufacturers limit charging to the top end and most (all?) warn when you hit the lower bound. But not all manufacturers report 100% when it hits that upper bound of that range. Many do, but not all. Some report 80% and let you bypass it, and some don’t cap that upper bound.
BillBurBaggins@lemmy.world 3 hours ago
Your first paragraph pretty much agrees with the grandparent of this whole thread. What constitutes “max” is something that the battery manufacturer and the phone manufacturer come up with.
You said “some do this some don’t”. It doesn’t make any sense at all. All manufacturers have to decide what 100% means. There is no some do some don’t.
Obviously not. Might as well stop at that then