... .5a dc size: 5.5*2.5mm CE/FCC/ROHS high quality,high reliability and stable of adapter Built-in OVP OCP OTP ... .5AMPOutput Voltage16VOverload ProtectionYESShort Circuit ProtectionYESRipple Noise200mvLine Regulation1%Load Regulation1%Compatible Laptop ModelThinkPad 240, 310, 360, 380, 385XD, 390, 390E, 385XD, 770ThinkPad ...