One of our favorite Shark robot vacuums is 58 percent off right now for Black Friday

Our pick for the best robot vacuum (or at least one of its many variants) is on sale. Amazon's Black Friday deals include the Shark AI Ultra robot vacuum. This model has a list price of $599, but you can snag one for $250. That's 58 percent off — and a record low.

One of this model's standout features is its bagless design. Like many robovacs, it has an auto-empty station. But here, you can remove part of the base, dump its contents in the garbage, and lock it back in place. The base holds up to 60 days of dirt and debris, and you'll never need to order bag refills.

The Shark AI Ultra has strong suction and decent obstacle avoidance (via LiDAR). The robovac cleans in a matrix grid. It auto-maps your home and supports Google Assistant and Alexa for voice control.

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The vacuum has a runtime of about 120 minutes. (If it needs to stop and charge, it will auto-resume afterward.) Also note that this is a vacuum-only model: no mopping here.

But Shark has other Black Friday deals if you're interested in a robovac that also mops, or even a cordless stick vacuum instead. The Shark Stratos 2-in-1 robot vacuum and mop is 60 percent off and down to $400 right now, while the Power Detect Pet Plus cordless vacuum with self-emptying base is down to $380.