Unitree A2 Review: Specs and Uses of the 42 kg Industrial Quadruped Robot
Updated: 7 days ago
The Unitree A2 is an industrial quadruped robot of about 42 kg, between the small Go2 and the heavy B2. Unitree sells it through its sales team and does not publish a price. This review covers its specifications, versions and uses.
Quick Verdict
The A2 is built around endurance. Two battery slots give 907 Wh, enough for more than five hours of continuous walking, about 20 km, without load, or more than three hours carrying 25 kg. Joints deliver about 180 N·m, the robot climbs 30 cm steps and 45-degree slopes, and it works from -20 to 55 °C. Two versions are offered: the A2 with one LiDAR and IP56, and the A2-PRO with two LiDARs and core components sealed to IP67.
Unitree A2 at a Glance
Weight: about 42 kg with battery
Walking load: about 25 kg
Endurance: more than 5 hours without load
Speed: 0 to 3.7 m/s
Protection: IP56
Price: on request
Unitree A2 Technical Specifications
The table below lists the manufacturer's specifications.
Specification | Unitree A2 |
Manufacturer | Unitree Robotics |
Size, standing | 820 x 440 x 570 mm |
Weight | About 35 kg without battery; about 42 kg with battery |
Degrees of freedom | 12 |
Max joint torque | About 180 N·m |
Speed | 0 to 3.7 m/s; up to about 5 m/s |
Continuous walking load | About 25 kg |
Max standing load | About 100 kg |
Battery | Single 9000 mAh (453.6 Wh); dual 18000 mAh (907.2 Wh) |
Endurance without load | More than 5 h, about 20 km |
Endurance with 25 kg | More than 3 h, about 12.5 km |
Slope | About 45 degrees |
Max stair step | 30 cm |
Operating temperature | -20 to 55 °C |
Protection | A2: IP56; A2-PRO: IP56 to IP67 |
Sensors | A2: 1 LiDAR and 1 HD camera; A2-PRO: 2 LiDARs and 1 HD camera |
Computing | 8-core CPU and Intel Core i7 |
Warranty | 12 months |
Design and Build Quality
The body is aluminium alloy and engineering plastic. Joints use crossed roller bearings, inner-rotor motors and dual encoders, with local air cooling. Dual battery slots allow one pack to be changed while the other keeps the robot running.
Programming and Software
Interfaces
RS485, CAN, Gigabit Ethernet and USB 3.0 ports and 12 V, 24 V and battery power outputs are provided for payloads.
Development
Secondary development is supported, with an optional high-computing expansion dock.
Updates
The robot receives over-the-air upgrades.
Unitree A2 Applications and Use Cases
Industrial Inspection
Long endurance covers large plants in one charge.
Payload Carrying
About 25 kg can be carried continuously.
Outdoor Operation
Sealing and temperature range allow outdoor use.
Unitree A2 Price and Value
Unitree lists both A2 versions as "Contact Sales" and does not publish a price.
For the company behind the product, read the Unitree Robotics Company Profile: History, Products, Stock Listing and Controversies.
Pros and Cons
Pros
More than 5 hours of walking
Dual batteries
25 kg walking load at 42 kg weight
Wide temperature range
Rich interfaces for payloads
Cons
Base version IP56 only
Second LiDAR only on the PRO
No published price
Who Should Buy the Unitree A2?
It fits inspection operators and integrators who need more endurance and payload than a small robot dog without the weight of the B2.
Unitree A2 FAQ
How much does the Unitree A2 cost?
Unitree does not publish a price; it is sold through its sales team.
How long does the Unitree A2 battery last?
More than 5 hours of walking without load, with dual batteries.
How much can the Unitree A2 carry?
About 25 kg while walking, and about 100 kg standing.
How much does the Unitree A2 weigh?
About 42 kg with battery.
How fast is the Unitree A2?
0 to 3.7 m/s, and up to about 5 m/s.
Is the Unitree A2 waterproof?
The A2 is rated IP56; the A2-PRO has core components to IP67.
What is the difference between the A2 and A2-PRO?
The A2-PRO has two LiDARs, higher protection and the follow module included.
Can the Unitree A2 climb stairs?
Yes, with steps up to 30 cm.
Specifications are based on manufacturer information and may change.
