NOVELTY - A lead-free battery (BB) consists of an anode, a cathode, a separator (f), and an electrolyte solution (e) arranged between the electrodes. The anode has an anode terminal (a) connected through the electrode base material (EE) of white-copper board mesh shape, or thin-film-like electrode base material vapor-deposited with white copper. The structure of anode-side electrode material (DD) consists of a paste material obtained by mixing anode electrode material (11) and calcium with carbon of preset amount, and mixing the binder.    USE - Lead-free battery is used for vehicle systems and portable apparatuses.    ADVANTAGE - The lead-free battery is a high-performance and high-capacitance rechargeable battery which does not use sulfuric acid in its electrolyte solution, and does not contain any pollutant. Quick charging is possible. Maintenance mechanism of battery is simplified. The lead-free battery is compact, economical and lightweight. Regeneration of electrode and electrolyte solution is possible, as no organic additives are used.    DETAILED DESCRIPTION - A lead-free battery consists of an anode, a cathode, a separator, and an electrolyte solution arranged between the electrodes, and does not use a lead. The anode consists of electrode material (11) chosen from silver oxide, nickel oxyhydroxide, and manganese dioxide, and electrode material (12) containing calcium and carbonate. The cathode consists of zinc as electrode material (91) and carbon as electrode material (92). The separator selectively allows the hydroxy ions to pass through to the intermediate portion of anode and cathode. An aqueous alkali solution or an ionic liquid is used for the electrolyte solution. The anode has an anode terminal connected through the electrode base material (EE) of white-copper board mesh shape, or thin-film-like electrode base material vapor-deposited with white copper. The structure of anode-side electrode material consists of a paste material obtained by mixing anode electrode material (11) and calcium with carbon of preset amount, and mixing the binder. The mixture is coated and dried on the anode-side electrode base material. The cathode has a cathode terminal (b) connected through the electrode base material (MM) of zinc-plate mesh shape, or thin-film-like electrode base material vapor-deposited with zinc. The structure of cathode-side electrode material (OO) is formed as follows. Zinc and carbon are mixed with a binder to prepare a paste (PP) for zinc only and a paste (PP) for carbon only which are then separately coated on the surface of cathode to form a zinc-carbon separated structure.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the lead-free battery.    Anode electrode materials (11,12)    Cathode electrode materials (91,92)    Lead-free battery (BB)    Anode-side electrode material (DD)    Anode base material (EE)    Cathode base material (MM)    Cathode-side electrode material (OO)    Pastes (PP)    Anode terminal (a)    Cathode terminal (b)    Electrolyte solution (e)    Separator (f)