Olympus CAMEDIA C-2000 Instruction page 66

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Note:
When the camera is being operated on batteries
that are running low, the camera may emit
several short beeps and blink the number of
storable pictures on the control panel after you
take a shot or when you turn on the power. If this
happens, the picture you have just taken will not
turn out properly. Replace the batteries and take
the picture again.
When taking pictures on a special occasion, on a
trip, or in cold temperatures, keep spare batteries
handy or use nickel metal-hydride batteries.
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