Is 30 Nm enough to remove car lug nuts?

Usually not. Most lug nuts need 80 to 120 ft-lb (about 110 to 160 Nm) to break loose, and 30 Nm is roughly 22 ft-lb. Treat this as a light-duty tool for small fasteners.

Is the battery really 2,000 Ah?

No. A 21V cordless tool battery of that size would be enormous; the figure is almost certainly a listing error. Expect a small pack in the 2.0 Ah class.

Does it come with a battery and charger?

The listing says batteries are included. A charger is not clearly stated, so confirm with the seller before buying.

How does it compare with a name-brand impact wrench?

Brand-name 1/2-inch cordless wrenches deliver several hundred Nm of torque and carry safety certifications. This one is far weaker and has no NRTL listing.

Is $41.99 a good price?

It is the only price recorded since October 31, 2026, at $41.99, so there is no lower point to wait for. Judge it against the low torque rather than the discount.