Abstract: A device for the accumulation of electrical energy contains a gas-electric battery having a hollow housing, partially filled with an electrolyte solution, and electrodes, positioned inside the hollow housing and made of a conductive adsorbent of the electrolysis gases. The electrodes are divided by a gas-permeable separator. Current-collectors linked to the electrodes are connected to a charge-discharge converter designed to allow for a periodic change in the polarity of the charge current during the charging process. The device makes it possible to provide a long operating life with minimal environmental pollution.