Nikon SB-5000 Reference Manual page 42

Compatible batteries and replacement/
recharging
When replacing batteries, use 4 fresh AA-size batteries or fully-charged
rechargeable batteries of the same brand. Refer to the following table to
determine when to replace batteries with fresh ones or recharge batteries
according to how long the flash-ready indicator takes to come on. Do not
mix old and new batteries or batteries of different types or makes.
B
Battery type
1.5 V LR6 (AA-size) alkaline battery
1.2 V HR6 (AA-size) rechargeable Ni-MH
battery
• For minimum recycling time and number of flashes for each battery
type, refer to "Specifications" (0H-23).
• Alkaline battery performance may vary greatly depending on the
manufacturer.
• 1.5 V R6 (AA-size) carbon-zinc batteries are not recommended.
• Using an optional external power source increases the number of
flashes and provides shorter recycling times (0H-17).
v
Additional precautions regarding batteries
• Read and follow battery cautions in "For Your Safety" (0A-16 – A-19).
• Be sure to read and follow the warnings for the battery on the section,
"Notes on Batteries" (0H-9), before using the battery.
B-17
Time the flash-ready indicator
takes to come on
20 s or more
10 s or more