PHOTOCHARGEABLE SECONDARY BATTERY

A Photo-chargeable secondary battery, carrying a charging performance representing a sufficient durability against repetition use by combining a flexible and durable photoelectric conversion sheet with a photoelectric transducer and a storage battery, comprises a cylindrical winding core section (2), a flexible photoelectric transducer (11) so arranged as to be /drawn out by being wound around the winding core section, a chargeable/dischargeable storage battery (4), and a control circuit section (5) which controls the charge/discharge of this storage battery. The whole is formed into a nearly cylindrical form with the photoelectric transducer wound around thee winding core section. The storage battery is detachable from the core section. The photoelectric transducer is folded in a drawing direction and provided with an engagement section (3a) constituting a grip and a means for storing different batteries.