Shanghai Greatway, Founded in 1997, Began with Our First Factory Producing Booster Cables. Shanghai Greatway is an ISO9001:2008 certified professional group manufacturer,owning three factories: Shanghai Guangwei Electric & Tools Co., Ltd., Shanghai Power Station Co., Ltd., and Shanghai Greatway Welding Equipment Co., Ltd., including booster cables, jump starters, battery testers, battery chargers, inverter welder machine, inverter plasma cutter and battery accessories. Most of our products have UL, GS, CE, PSE,SAA and other certifications.