Tokai TCP-124 Manuel D'utilisation page 13

11. Batteries shall not be exposed to excessive heat such as sunshine,
fire or the like.
12. Class 1 LED product.
POWER CONNECTION
Plug the AC power cord to a household outlet AC source. This unit
is equipped with a battery backup system, it requires a 3V CR2032
flat lithium battery (not included). Insert the battery in the battery
compartment, making certain that the positive and negative (+ and -)
battery terminals are attached to the corresponding terminals on the
plate in the battery compartment. If an AC power failure occurs, the
clock automatically switches to the battery power supply, the clock
and timer memory continue running. When the AC power resumes,
the clock switches back to AC again.
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