The red light flashes every 3 seconds during standby.
When actually on, the red light will only flash when the battery level is low.
The only way to turn the red light off is to totally switch it off.
This is either done when the light is on, by holding down the power button - then total shutdown.
Else, unwind the battery carrier by say 1/4 of a turn to disconnect the current - for true shutdown and lockout...