Nikon SB-900 - Manual (Page 124)

F–8
F
Ti
ps on Speedlight care and reference information
Notes on batteries
Suitable batteries
Use four AA-type batteries of any of the following types:
Alkaline-manganese (1.5V) batteries
Lithium (1.5V) batteries
Oxyride™ (1.5V) batteries
Ni-MH (1.2V) batteries
High-power manganese batteries are not recommended.
Depending on battery specifications, when batteries become hot, the SB-900’s
safety circuits are activated, cutting off power. This often occurs when the flash
unit is operated in the repeating flash mode. Battery power will recover when
the temperature returns to normal.
Be sure to read the user’s manuals for your rechargeable batteries and battery
charger for detailed information on how to handle and recharge the batteries.
Never attempt to charge batteries that are not rechargeable batteries, as they
could explode.
Notes on handling batteries
Because flash consumes a large amount of battery power, batteries may not
operate properly before reaching the end of their stated lifespan or the number
of charges/discharges as specified by the battery manufacturer.
When replacing batteries, replace all four batteries at the same time. Do not mix
battery types or brands or use old with new batteries.
When installing batteries, turn off the power of the Speedlight and never
reverse the polarity of the batteries.
If the battery terminals become soiled, remove dirt and smudges before use, as
this may cause malfunction.
Battery power tends to weaken as the temperature drops. It also gradually
decreases when batteries are not used for a long time and recovers after a short
break following intensive use. Be sure to check battery power and replace the
batteries with fresh ones if you notice any delays in the recycling time.
Do not store batteries in locations subject to high temperatures and high humidity.
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To protect the environment, do not dispose
of used rechargeable batteries yourself.
Instead, take these batteries to your nearest
recycling center.
Recycling rechargeable
batteries
Ni-MH