... AC100-240VOutput: 12-24V2AOperation InstructionConnect battery pack to output connector and plug AC power source.Make sure battery polarity is connected correctly ... . Output Connector: USB, DC, JST, XRL, Alligator Clip,Air plug and so on.Certificate Approval: UL, CE, FCC, SAA, PSE, ... Electric Device, Phone, MP3/MP4, Boat Device, Rechargeable Bus and so on. 12-24v 2a smart nimh/nicd battery charger