... ,2A optional.Output voltage:4.2V+-1% Product Name: Universal 4.2V adapter for charging 3.7V li-ion battery ... 8A,1.0A, 1.2A,2A optional)- Full charing voltage: 4.2V+-1% - Charging state indicator: Red - on charging, ... Green - full charge or idle- US plug, EU plug, UK plug, Aust plug optional ... Compliance with UL,CE,RoHS,EMC We also provide 4.2V, 8.4V, 12.6V,16.8V, 21V, ...