In article , sms
wrote:


So they don't work "fine".* My understanding is if Apple didn't install
software to throttle the CPU the battery would cause the phone to
shutdown. That's not working "perfectly fine".

No.

Whether the battery is brand new, or three years old, if it's in a low
state of charge it could shut down under heavy processor demand.

state of charge is not the issue. it's aging to where it can't supply
peak loads anymore, even if it's at full soc.

Here are the good choices:

1. Shut the phone down before the battery is discharged to a level that
would cause an unexpected shutdown if high demand were placed on the
battery. If this event occurs after an abnormally short amount of
operating time, inform the user that a battery replacement is needed.

that exists now.

2. Reduce performance only when the battery is discharged to a level
that would cause an unexpected shutdown if high demand were placed on
the battery.

that's what apple is doing (and some android makers even though they
refuse to outright admit it).

3. Give the user the option of a "battery-saver" mode that would reduce
performance in order to increase the operating time.

that also exists now.