Unitree A2 vs Unitree B2: Two Flagship Quadrupeds from the Same Brand

The B2 weighs 60 kg and carries over 40 kg while walking (up to 120 kg statically), the A2 weighs 42 kg and carries 25 kg. Both have 12 degrees of freedom, a speed of 5 m/s for the A2 and up to 6 m/s for the B2 in a special configuration, and about 5 hours of runtime. The B2 has a 2250 Wh battery (4–6 hours, over 20 km of range unloaded), the A2 two hot-swappable batteries, which shortens charging breaks.

The main difference is sensing. The A2 has two industrial LiDARs, front and rear, an HD camera and a front light, giving fuller coverage of the surroundings than the single 3D LiDAR in the B2. The B2 additionally has two depth cameras and two optical cameras, and an Intel Core i5 or i7 computer. The A2 can be ordered in a wheel-leg option intended for terrain transport. The B2 handles 20–25 cm stairs, obstacles up to 40 cm and slopes above 45°; for the A2 we have no such data. More on reading these figures: “How to Read a Robot Datasheet”.

This is where uncertainty begins. The Unitree shop gives USD 100,000 for the A2 as a placeholder value requiring contact with sales, while other price guides indicate USD 31,900–46,900. For the B2, roundups cite USD 76,900–296,000. The discrepancies are large enough that we treat none of the figures as a market price.

In Poland we saw the B2 at PLN 270,000 (≈ EUR 61,870) (x-kom) and PLN 299,000 (≈ EUR 68,510) (Botland), and the A2 Pro at PLN 195,000 (≈ EUR 44,680) (x-kom). A2 availability is in fact described contradictorily: some data point to sellers, and other sources speak of no official distribution. So ask for a written quote and a delivery confirmation.

Choose the B2 when payload and a proven platform matter: carrying tools, heavy equipment, security of sites and rescue. It has a longer deployment history, although we know of no documented ones in Poland.

The A2 suits integrators who develop their own logistics, inspection or rescue applications and need continuous operation thanks to two batteries and better sensor coverage. For warehouse tasks where lower mass counts, see warehouses. A simple split helps the decision. If the task is lifting and long routes with heavy equipment, the B2 has the payload advantage of 40 kg against 25 kg. If continuity of work and wider vision count, the A2 has two batteries and two LiDARs. Speeds are similar and runtime is about 5 hours for both, so payload and sensing will decide, not a race. Treat both platforms as tools for a technical team, not off-the-shelf equipment. A full overview of uses: “Quadruped Robots: Uses in Inspection, Security and Industry”.