... 8.4V4A CE Li-ion battery laptop charger 1)input voltage: AC 100-240V 50/60HZ2)range voltage: AC 90-264V 47/63HZ Safety ... , GS, BS, CE, CB, FCC, and EK-Mark Protections1)over voltage protection: 120%min2)over current protection: 120%min3)over protection4 ... temperature: -20-853)opera ting relative humidity:595%RH4) Withstanding voltage: AC 3,000V (minimum), 5mA (maximum) 5Insulation resistance: DC 500V ...