Sạc laptop Asus K50 K51 K70 K71 K72 K60 K60 K62 F50 F52 X5 X51 X50 X70 N51 U52 U52F U53 U53F U56 K55 A55 U57 R500A K52 K53 K53E UL50 G51 G72 G73 N50 N53 G50 N61 X55C U50 R503C X52 X53 X54 X55 X57 G60 90W