The invention relates to an activatable battery (10) with at least one cathode (26), at least one anode (22), at least one arranged between the anode (22) and the cathode (26) and with the anode (22) and the cathode ( 26) in contact with absorbent separator layer (24) and a liquid electrolyte (17) separated therefrom, which is provided in a device which releases the electrolyte (17) to activate the battery in such a way that it comes into contact with the separator layer (24) comes and penetrates this at least to such a extent that the electrolyte (17) connects the anode (22) and the cathode (26) to one another in an electrically conductive manner, the anode (22) consisting of lithium or a lithium-containing alloy and the cathode ( 26) comprises elemental carbon, the cathode (26) consisting of a film comprising carbon nanotubes or of a film consisting of carbon nanotubes.
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