Replacing the date battery, Be sure that the camera is turned off – Canon A100 User Manual
Page 135
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Replacing the Date Battery
If the LCD monitor displays the Set Date / Time
menu when you turn on the camera, this means
that the Date battery has run down and the clock
has stopped running. Please purchase a
replacement battery (battery type CR2016) and
install it as follows. (The date battery is
preinstalled at the factory and may therefore
expire earlier than its rated lifespan after the
camera has been purchased.)
A
O Be particularly careful to keep the date
batteries out of the reach of children. Seek
medical assistance immediately if a child
swallows a battery since corrosive battery
fluids could damage the stomach or intestinal
wall.
1
Be sure that the camera is turned off.