Olympus FL 50R Instruction Manual page 51

If you notice any abnormalities such as leakage, discoloration,
deformation, overheating, or odor, stop using this device. Continued
use could result in fire, overheating or explosion. Remove the batteries
carefully to avoid burning yourself and to prevent exposure to gas or
dangerous fluids that may be released. Contact your dealer or consult
your Olympus Authorized Service Station.
Always remove the batteries when you don't expect to use the
electronic flash for a long period. Otherwise, heat generation or fluid
leak from the batteries may result in fire, injury and/or contamination of
the surroundings.
Do not use a leaking battery. Doing so could result in fire or electric
shock.
Do not handle the electronic flash with wet hands. Doing so could
result in electric shock.
Do not leave the electronic flash in a place where it may be exposed to
high temperatures. Otherwise, deterioration of parts or fire may result.
Do not take out the batteries immediately after using the electronic
flash continuously for a long period.
Otherwise, the hot batteries may cause burns.
Do not deform the battery compartment or allow any foreign objects to
get inside.
CAUTION
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