Canon 540EZ - Manual (Page 9)

Battery Notes
• Use four new batteries of the same type, and always replace all four batteries at
the same time
• AA-sIze manganese batteries (R6/UM-3) can also be used, but will provide fewer
flashes than alkaline-manganese or Ni-Cd batteries.
• The terminals of some AA-size Ni-Cd batteries are of different shape than stan­
dard AA-size batteries. Make sure the batteries are usable before purchasing.
• When you will not use the flash for a long period of time, be sure to remove the
batteries and store them separately.
• In cold environments, prepare two sets of fully-charged Ni-Cd batteries and keep
one set in a warm location such as an inside pocket When the set in the flash
becomes weak, exchange it with the warm set. The weak set can be used again
later after it returns to a warmer temperature.
• Dirty battery contacts can prevent the flow of electrical power to the flash circuit­
ry. To prevent corrosion and dirt built-up, wipe the contacts with a clean cloth
each time you exchange the batteries
• AA-size lithium batteries (FR6) can also be used in the 540EZ.
Battery Life and Recycle Time:
Battery type
Battery life
(No. of bursts)
Recycle tirrte (seconds)
Quick flash Normal flash
AA-size alkaline-manganese (LR6/AM-3) 100-700 0 2 - appx 2 02 - 13
AA-size Ni-Cd (KR15/51) 45-300 0 2 - appx 1.5 0-2 - 7
■ In the battery life column, figures on the right indicate the number of bursts in A-TTL
mode, and figures on the left indicate the number of bursts in manual full-power (1/1)
mode.
• In the recycle time columns, figures on the left indicate the recycle time in A-TTL mode,
and figures on the right indicate the recycle time in manual full-power (1/1) mode
■ When using an external power source with the 540EZ, note the following cautions The
battery life will depend on the batteries installed in the 540EZ and not on the external
power supply.
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Use of internal batteries with an external power supply—
• Batteries must be loaded in the flash unit even when using an external power
supply in order to supply power to the flash circuitry Make sure batteries are
loaded in the flash unit at all times during use.
• When using an external power supply, both the internal batteries and the exter­
nal power supply are used for flash charging. Accordingly, it is possible that the
internal batteries will become exhausted before the external power supply bat­
tery. Be sure to always carry a spare set of AA-size batteries for the flash unit