Canon 550EX manual Recharging Time and Available Flashes, Installing Batteries

Installing Batteries

•Use four new batteries of the same type. When replacing batteries, replace all four batteries at one time.

•Size-AA lithium batteries can also be used.

•Although non-alkaline, manganese batteries may also be used, the number of flashes will be less.

•Remove the batteries when the 550EX will not be used for an extended period.

•In low temperatures, take two sets of batteries and keep one set warm in a pocket, etc., and use the batteries alternately.

•To prevent faulty connections, make sure the battery contacts are clean. If necessary, use a clean cloth to wipe the battery contacts.

•In the case of size-AA nickel-hydride and size-AA lithium batteries, the shape of the contacts is not standardized. Be sure that the batteries are compatible with the flash unit before buying.

Recharging Time and Available Flashes

Battery Type	Recharging Time		Available Flashes
	Quick Flash	Normal Flash
Size-AA alkaline	Approx. 0.1 - 4 sec.	Approx. 0.1 - 8 sec.	Approx. 100 to 700
batteries

•The minimum recycling time applies in the E-TTL or TTL mode while the maximum recycling time applies in the manual or full-output (1/1) mode.

•The minimum flash count applies in the manual or full-output (1/1) mode while the maximum flash count applies in the E-TTL or TTL mode.

•The above specifications are based on Canon’s testing standards.

•Using size-AA nickel-hydride batteries will yield only about 70 to 80 percent of the flashes (1550 mAh at full output) obtainable with size-AA alkaline batteries. The recycling time will also be about half the time with size-AA alkaline batteries.

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