... can be charged to all brands of laptop. Such as Dell, Hp, Toshiba, Samsung, Acer, IBM, Sony, Lenovo, Fujitsu, Compaq, Delta, Gateway, Liteon ... .M4DC 18.5V4.8*1.8mmCompaq,HP etc.M5DC 19V5.5*2.5mmAcer,Compaq,Delta,HP,Fujitsu,Gateway,Toshiba,Liteon etc.M6DC ... *3.0mmSamsung etc.M7DC 19V5.5*2.1mmAcer,Compaq,Delta,HP,Fujitsu,Gateway,Toshiba,Liteon etc.M8DC 19.5V6.5*4 ...