Nikon Autofocus Speedlight SB-24 - Manual (Page 133)

DC Unit SD-7
Nikon DC Unit SD-7 can be used as an optional external power
source for more flash capacity and faster recycling. To use it,
connect the SD-7’s power cord SC-16 to the SB-24's external
power terminal. Even when powered with the SD-7, the SB-24
still requires batteries inside the flash unit. Do not remove the
batteries.
In continuous shooting using the externai power source DC Unit
SD-7, to prevent flash head deteriorafion caused by heat, do not
exceed the maximum number of flashes as listed below.
Flash mode Max. number of flashes
TTL auto an
Non-TTL auto H
15
Manual EQ
15 (at full or 1/2 power)
40 (at 1/4 power or less)
Repeating flash 59 10
Before firing the flash again, stop using for more than 10
minutes.
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