Document quick-charging method
From Todd in Matrix, approved by Eric:
- Plug in power, push power button briefly to see the red light for charging.
- Unplug power; push power button for 12 to 15 seconds (until light turns green); plug power back in (see red light come on).
- Shutdown via shutdown UI; or power hold for 4+ seconds.
This only helps if the phone can boot to a user interface.