A method and apparatus of the present invention are designed to equalize cell-to-cell imbalances in a multi-cell lithium battery system. The method includes detecting the interference between two physical tooth models. The invention also provides processes for preparing compounds of the invention. The planar liquid crystal cell is placed above the reflective polarization electrode array. The resonator is a thin film tuning-fork type inflection resonator in which a thin film made of a piezoelectric material is formed on a substrate on which a lower electrode is formed, and an upper electrode is formed on the piezoelectric thin film.