A battery pack (70) is provided which can be suitably used in a case where charging of a dedicated secondary battery (20) in a portable terminal device (10) is difficult. The battery pack (70) is mounted in a battery mounting section (11) in a portable cel...

An electric energy storage element contains a secondary battery or a capacitor. The electric energy storage element comprises a quinoxaline trimer compound as an electrode active substance and uses a proton as a charge carrier for the trimer compound. The ...

A power source circuit is provided which is capable of improving an efficiency of using energy of a chemical battery cell (11) and of responding suitably to an intermittent change in a load current. Since, during a load burst period in an odd-numbered orde...

The present invention relates to an electrolytic solution comprising an aqueous solution of an organic or inorganic acid whereto a water-soluble N-containing heterocyclic compound is added, and an electrochemical cell such as a secondary battery and an ele...