Usb Tip per Lenovo. 5.5x2.1mm (19.0V) Acer, Compaq, Delta, HP, Fujitsu. 5.5x2.5 mm (19.0V) Acer, Compaq, Delta, HP, Toshiba. 4.8x1.7 mm (18.5V) Compaq, HP.
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