Ena ke bophara ba 500mm, elektrode e phahameng ea graphite. Elektrode ea boleng bo holimo ea graphite ea China. Li-electrode tsa graphite tse hlahisoang ke fektheri ea rona li na le boleng bo botle, ts'ebetso e tsitsitseng, tšebeliso e tlaase, litlhaloso tse feletseng, ho fana ka potlako le tšebeletso e ntle.