... acid or water for maintenance in usage6.Excellent large current discharge performance, and have obvious advantages in startup ... source (UPS)3.Power transmission and transformer station, switch-control, and accident lighting4.Fire fighting, safety device, ... ISO14001: 2004, ISO9001: 2000, OHSA28001: 2001,TS16949.Certifications:UL,FCC,ETL,CE,RoHS.Cooperation Association: “Tsinghua University Institute” ...