Canon SPEEDLITE EL-1 Advanced User's Manual page 32

Firing interval and number of flashes
EL-1 alone
Quick flash
Approx. 0.1 to 0.8 sec.
* The Quick flash function enables flash photography before the flash is fully charged (
CAUTION
When performing continuous flashes, do not touch the flash head, batteries,
or the area near the battery compartment.
When continuous flash or modeling flash is repeatedly fired at short intervals, do
not touch the flash head, batteries, or the area near the battery compartment. The
flash head, battery, and area near the battery compartment become hot, resulting
in a risk of burns.
Do not touch the same part for a long period of time while using the
Speedlite.
Even if the product does not feel too hot, prolonged contact with the same body
part may cause skin redness or blistering due to low-temperature contact burns.
Note
When < > is displayed or the LCD panel display turns off during recharging,
charge the battery.
Firing interval
Normal flash
Approx. 0.1 to 0.9 sec.
32
Number of flash firings
Approx. 335 to 2345 times
).