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In the paperwork are presented new aspects regarding test results of galvanic cells used in the apparatus intended for use in explosive atmospheres. In the first part of the paper was presented the explosion risk. The explosion risk involved by the presence of technical equipment in areas endangered by the presence of flammable substances is manifested through two sources of risk. The spark ignition is due to electrical equipment, electrostatic discharges and mechanical impact. The mixtures of air with flammable s...