5.5x2.1mm (19.0V) Acer, Compaq, Delta, HP, Fujitsu. 5.5x2.5 mm (19.0V) Acer, Compaq, Delta, HP, Toshiba. 5.5x2.5 mm (16.0V) IBM, Lenovo. 4.8x1.7 mm (18.5V) Compaq, HP. 7.4x5.0 mm (18.5V) HP, Compaq. 6.5x4.4 mm (19.5V) Sony.
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