JVC RD-F321W Notice D'utilisation page 55

BATTERY WARNING: Only adults should
handle the batteries. Do not allow a
child to use this product unless the
Battery Cover is securely attached to
the Battery Compartment.
The battery type used in this product is
six UM-2 size batteries. These batteries
are located internally and are readily
accessible.
Remove the battery cover on the
bottom of the product to remove the
batteries.
These batteries must be disposed of at
your local recycling point.
GB-6