Input voltage : DC 3-6V(Recommend DC 3.7V 5V) Input current : 1A(1A Version);2A(2A Version);4A(4A Version) Charging voltage: 12.6V Charging current : 0.37A(1A Version);0.74A(2A Version);1.48A(4A Version) Feature: Switching Frequency up to 1MHz Quasi-CV mode to Compensate for the Voltage Loss on Battery Internal Resistance and Trace Resistance Automatic Recharge Protection for Battery Voltage Being Low than Input and Short Battery Good adaptability to Input Supply with Limited Driving Capability Battery Overvoltage Protection Led indicator : ''CR'' LED is charge status indicator ''OK'' LED is fully charged OR Constant voltage mode; Operating Ambient Temperature-40℃ to +85℃ Size 39mm x 18mm x 6.3mm Weight: 5g Applications: PDA, MP3 Players, MP4 Players Digital Cameras Bluetooth Applications Game Players Notebook li-on li-po Lithium Battery 18650 Mobile phone Solar charging Audio equipment Portable Devices POS, Electric Fan TYPE-C charging equipment