Nikon Autofocus Speedlight SB-24 - Manual (Page 23)

Special Standby Function
In normal Standby function, when the camera's meter turns off,
the SB-24 also turns off. To reactivate the SB-24, turn the
camera’s meter on. With the following procedure, however, even
after the camera's meter turns off, the SB-24 automatically
recharges In approx, one-hour Intervals, so it will always be
ready for long shooting sessions.
1. Set power switch to OFF to turn off the SB-24.
2. While pressing illuminator button, set power switch to STBY.
3. Confirm LCD panel display blinks approx. 8 seconds.
• The SB-24 can be kept in standby for approx. 20 days
with AA-type aikaline-manganese batteries or approx.
10 days with AA-type NiCd batteries.
• To cancel this function, set the SB-24's power switch to
OFF.
ON Position
—With Nikon FA, FE2 or FG:
To turn on the SB-24 when using a mechanical shutter setting
(M250 with FA or FE2, M90 with FG, or B), you cannot use
STBY position; set the power switch to ON.
When not using the SB-24, always set power switch to
OFF to conserve battery power.