Elba EHS 635 SB Instructions For The Use - Installation Advices page 13

BATTERY FOR ELECTRIC IGNITION
In some models the battery is the
power supply for the electronic ignition
of gas burners.
Batteries last on average for about
two years (alkaline battery) depending
on how often the electronic ignition is
used.
Fig. 2.6
Fig. 2.8
Fig. 2.7
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