Olympus FL 50R Instruction Manual page 52

Use only the specified batteries.
Be sure to observe the following points. Otherwise, battery fluid leak,
overheating, fire ignition and/or bursting may result.
Do not mix old and new batteries, recharged and discharged batteries,
batteries of different capacities, or batteries of different types or brands.
Do not attempt to recharge non-rechargeable batteries such as alkaline
batteries.
Do not load or use the batteries with the +/– polarity reversed. If the
batteries do not fit smoothly in the battery compartment, do not force
them.
Never use a battery if its outer coating (insulation) has been partially or
entirely peeled off. Otherwise, leakage, overheating or explosion may
result.
Some brand-new batteries may also have their outer coating
(insulation) peeled off completely or partially. Never use these
batteries.
Do not use the following kinds of batteries.
Outer coating
(insulation) is
peeling or has
peeled off (even
if the battery is
brand-new).
If battery fluid gets on your skin or clothes, it may irritate your skin.
Immediately rinse your skin or clothes with clean water.
If battery fluid comes in contact with your eyes, blindness may result.
Rinse your eyes with clean water without rubbing them and see a
doctor immediately.
Do not apply a strong shock to a battery or throw it.
Do not immerse batteries in water or expose to moisture including rain,
seawater and animal urine.
Do not throw a battery in fire or heat it.
52
EN
BATTERY PRECAUTIONS
The negative
end is slightly
swollen and
is not covered
by the coating
(insulation).
The negative end
is flat (whether or
not a part of the
negative pole is
covered by the
coating).