Multiple cell battery

A battery comprising:

• a plurality of solid electrolyte films stacked on one another, each having a plurality of unit cells formed thereon, each of the unit cells comprising:
• a positive electrode disposed on a first side of the solid electrolyte film;
• a positive electrode contact region located on the first side of the solid electrolyte film, the positive electrode contact region formed on the positive electrode and adapted to make an electrical contact of the positive electrode on the first side of the solid electrolyte film;
• a negative electrode disposed on a second side of the solid electrolyte film at a position opposite to the positive electrode;
• a negative electrode contact region located on the second side of the solid electrolyte film, the negative electrode contact region formed on the negative electrode and adapted to make an electrical contact of the negative electrode on the second side of the solid electrolyte film;
• and
• a part of the solid electrolyte film sandwiched between the positive electrode and the negative electrode, wherein
• the plurality of unit cells formed on each of the solid electrolyte films, excluding two outermost solid electrolyte films, not being electrically connected in parallel to each other,
• the unit cells on one solid electrolyte film being electrically connected in series to unit cells on another solid electrolyte film immediately adjacent to the one solid electrolyte film, respectively, thereby forming a plurality of rows of series-connected unit cells,
• the unit cells on one outermost solid electrolyte film being electrically connected in parallel to each other,
• the unit cells on the other outermost solid electrolyte film being electrically connected in parallel to each other, and
• the rows of series-connected unit cells are electrically connected in parallel.