AC adapter and battery options - ThinkPad 380, 385
Terminology: 2-pin refers to a round, barrel shaped connector 4-pin refers to a trapezoid shaped connector with 4 holes in it
2-wire refers to a non-grounded adapter using a non-grounded line cord You must match the 2-wire adapter to the 2-prong cord 3-wire refers to a grounded adapter using a grounded line cord You must match the 3-wire adapter to the 3-prong cord