by Matt Zabojnik
When your battery drops to 15% or less, emergency charge mode enables.
While enabled: if you plug your phone in, it will set airplane mode, doze mode, and shut down 3 CPUs, and set one CPU to 10%
This should make your phone charge extremely fast if it's about to die. If you unplug it, airplane and doze mode turn off, and CPUs return to normal.
Note: If you're in a call when you drop to 15% and you plug in, it will skip airplane mode and activate everything else.