Fast charging mode : 1.0A (4.2V 2pcs x 1.0A)Fit to 3.6V or 3.7V LAithium battery in different sizeReverse polarity protectionActivation functionAuto-detect charging functionOver-charging protectionShort circuit protectionFast charging mode : 1.0A (4.2V 2pcs x 1.0A)Fit to 3.6V or 3.7V LAithium battery in different sizeReverse polarity protectionActivation functionAuto-detect charging functionOver-charging protectionShort circuit protection