When battery is 20%

For when you are out and your battery is dying and you want to keep your phone alive until you get home.

Wi-Fi off in car. .

prevents connection optimizer from blocking screen

Wi-Fi off when Waze on.

Phone's connection optimizer sometimes throws up a screen blocking Waze screen if Wi-Fi enabled.

07b. Battery dying away from home

when you've left your phone somewhere unattended (the car for instance or at a restaurant) and you haven't missed it yet, and the battery is getting ready to die, it will send a message to wife's phone (for example) .

07c. Reminder to plug in when phone battery about to die.

when phone is left unattended and battery is about to die, it will shout warning and play sound with it's last gasp. :-D

03b. Fallen asleep without plugging in.

Forgot to include external power disconnected from last upload. oops!