Sheet batteries are connected in series, layered and sandwiched between an upper substrate and a lower substrate, and the sheet batteries, the upper substrate and the lower substrate form a layered substrate with the batteries. The optimized system employs at least one zoned slurry concentrator to enhance purification of the aromatic dicarboxylic acid. The apparatus further includes a hydraulic cylinder moveable between raised and lowered positions, and a chair moved into the pool when the cylinder is moved toward its lowered position and lifted above the pool when the cylinder is in its raised position. The second photoresist Y has a lower glass transitional temperature than the first photoresist X. Two diagonal lines connecting the four corners intersect at a center of the dome portion.