110V/125V/220V Battery chargers (with sizmm) and OPzV batteries,nickel cadmium batteries are used for 15MW-60MW power plants,10KV-500KV power substations,national grid,petroleum,electric power,thermal power,hydropower station,substations for breaker closing,emote communication,chemical,metallurgy,coal,paper making,machery,wine,textile,building materials,ect.