Re: is my phone ON or is it OFF?

Jeff Layman <Jeff@invalid.invalid> wrote:
[...]

The charging circuitry is within the battery itself. It controls the
rate of charge and, in particular, monitors the temperature of the
cell(s). If it gets too high it will stop the charging. Note though,
that the connection from the phone's charger socket (lightning, USB, or
whatever) goes through some of the phone's circuitry, so the phone knows
the state of charge of its battery. That way its % charge can be
displayed on the phone's screen, and battery-usage apps can let you know
what's being used and how long the phone might last before recharging is
essential.

  The fact that the phone is charging and how full its battery is, is
also displayed/displayable when the phone is switched 'off'.

  Ergo, the phone is never really off. It's either awake or sleeping
during normal use or in cold standby when the user switched it 'off'.

[...]