Disclosed are a solar cell and preparing method of the same. The data terminal ready pin of the first RS-232 connector is connected to the DTR pin of the second RS-232 connector, and the clear to send pin of the first RS-232 connector is connected to the CTS pin of the second RS-232 connector. The dual attachment assembly may comprise a primary attachment structure forming a directional attachment between the flexible member and the central shank, and a secondary attachment structure forming a frangible attachment of the flexible member to the central shank. The oxidant electrode further includes a reinforcement layer at the oxidant-facing side, configured to prevent a distortion of the solvophobic layer therethrough, towards the oxidant-facing side.