: A standard choice for most "slim tip" units.

: Ideal for power-hungry mobile workstations.

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: A reliable third-party alternative often in stock for quick pickup.

: Used primarily for older IdeaPad and Flex series.

Depending on your model (ThinkPad, Yoga, IdeaPad, or Legion), you will likely need one of these three common types:

: Common for older business laptops and workstations.