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> Why doesn't the UI report 80% as 100%? Because the last time they tried "silently manage the battery without the user being part of the decision" it didn't g

> Why doesn't the UI report 80% as 100%? Because the last time they tried "silently manage the battery without the user being part of the decision" it didn't go over real well?

outworlder 7y ago
That wasn't even managing the battery, per-se(although it is power management, it wasn't strictly about health). It was reducing clock speeds to extend the amount of time the device would be on. They still do it even if the device has a healthy battery: drain the phone to 1% and you will see. Rather than running at full blast and shutting down, you can extract more runtime. Some EVs do something similar: the Nissan Leaf, when the battery gets really low(and I mean it, far past the point where you lost all percentage and mileage indicators), will enter a reduced power mode (or popularly called "turtle mode"). This allows it to eke out a few more miles out of an otherwise mostly dead battery. There is a "turtle" that lights up on the screen, maybe Apple could just do that. Turns out batteries hate when they are almost empty and you are trying to extract full power from them, voltage drops even more. So there are some compromises that have to be made.
- NickNameNick 7y ago
  The problem was the phones battery couldn't deliver enough current to run the cpu at full power, even though it had charge remaining to run the phone for some period of time in a lower power mode. Without power management, when a high demand task came alone and the CPU tried to draw more power, the phone would crash or shut-down. The firmware update capped performance not to extend the run-time when the batteries were low, but to allow the phone to run reliably when the batteries were worn.
- saagarjha 7y ago
  > the Nissan Leaf, when the battery gets really low(and I mean it, far past the point where you lost all percentage and mileage indicators), will enter a reduced power mode (or popularly called "turtle mode") TIL. I thought I was pushing it coming home with 2 miles left…
cmckn 7y ago
Touché!

> Why doesn't the UI report 80% as 100%? Because the last time they tried "silently manage the battery without the user being part of the decision" it didn't go over real well?

outworlder 7y ago

That wasn't even managing the battery, per-se(although it is power management, it wasn't strictly about health). It was reducing clock speeds to extend the amount of time the device would be on. They still do it even if the device has a healthy battery: drain the phone to 1% and you will see. Rather than running at full blast and shutting down, you can extract more runtime. Some EVs do something similar: the Nissan Leaf, when the battery gets really low(and I mean it, far past the point where you lost all percentage and mileage indicators), will enter a reduced power mode (or popularly called "turtle mode"). This allows it to eke out a few more miles out of an otherwise mostly dead battery. There is a "turtle" that lights up on the screen, maybe Apple could just do that. Turns out batteries hate when they are almost empty and you are trying to extract full power from them, voltage drops even more. So there are some compromises that have to be made.

NickNameNick 7y ago
The problem was the phones battery couldn't deliver enough current to run the cpu at full power, even though it had charge remaining to run the phone for some period of time in a lower power mode. Without power management, when a high demand task came alone and the CPU tried to draw more power, the phone would crash or shut-down. The firmware update capped performance not to extend the run-time when the batteries were low, but to allow the phone to run reliably when the batteries were worn.
saagarjha 7y ago
> the Nissan Leaf, when the battery gets really low(and I mean it, far past the point where you lost all percentage and mileage indicators), will enter a reduced power mode (or popularly called "turtle mode") TIL. I thought I was pushing it coming home with 2 miles left…

cmckn 7y ago

Touché!