Canon Speedlite 550EX Instructions Manual page 11

Installing Batteries
Batlery Cautions
Use four new batteries of the same type. When replacing batteries. replace all four
baNeries at one time.
Although non·alkaline batteries (RS) may also be used. the number of flashes will
be
fess.
The contacts of Nicad baneries are not standardized. If you want to use Nicad
batteries. make sura the baNery contacts
touch
the battery compartment's contacts
sBCUfely.
Remove the balleries
when
tile Speed\ite
will
not be used for an extended
period.
In low temperatures. take
two sets
of fully<harged Nicad balleries and keep one sat
warm in a pocI(et. etc" and use the balleries alternately.
To
~revent
faulty connedions.
make
stlre the ballery contacts ale dean. If necessary,
use a clean doth to wipe the ballery contacts.
Sile-AA lithium FRS balleries can also be used.
Recharging Time and Available Flashes
Ballery Type
Recharging Time
Available Flashes
Quid!.
Flash Normal Flash
Size-AA alkaline
Appro~ . 0.1 ·4 sec. Approx. 0.1 . 8 sec. Appro~.
100 to 700
LRS batteries
Size·AA Nicad
Approx. 0.1·2.5 see. Approx. 0.1 . 5 sec. Approx. 40 to 300
KR t5,lSI balter;es
The minimum feeh3rging fime appIles to the E-TTl or TTL mode while the maximum recharging
~me
applies to the manual
Of
full-output (1 /1) mode.
The min imum available flashes applies to the E·TTL or TTL mode while the maximum available
flashes
a~pl ies
to the manual or full·output (111) mode.
The above data ale based on Canon'S standard tests with new balleries.
11