Genuine Unitree Parts
Unitree B2 Accessories
Unitree B2 accessories are the official add-ons and spare parts for Unitree's 60kg industrial quadruped — and power is where most fleets start. The B2 runs the BT2 battery series in three versions: the BT2-10 standard pack it ships with, the BT2-11 cold-weather pack factory-fit on the B2-W, and the BT2-12 high-temperature pack with 1-hour fast charging. Beyond power, the official line covers the leg package for fleet maintenance, the wheeled foot kit, the autonomous charging station and compute expansion. Every part on this page uses the same mounting points, connectors and firmware support as the equipment your robot shipped with.
Prices are confirmed per quote with current stock and lead time. We ship worldwide via DHL or FedEx; lithium batteries travel as regulated air cargo in UN38.3-compliant packaging.
Genuine Unitree B2 Accessories, Quoted to Order
Every accessory here is genuine Unitree hardware — the same parts that ship with the robot or that Unitree sells as official spares. We don't list compatible-with clones: if Unitree doesn't make it for the B2, it isn't on this page.
- Step 1Send an inquiry
One line per part with the quantities you need — that's all it takes to start.
- Step 2Get a confirmed quote
We reply with a quote confirming current stock, lead time and shipping to your country.
- Step 3Worldwide dispatch
Confirm the quote and your order ships via DHL or FedEx with tracking.
B2 Accessory Specifications at a Glance
Key parameters for the accessory lines on this page, taken from Unitree's official documentation. Full specifications live on each product page.
| Key Specifications | Notes | |
|---|---|---|
| Battery — Standard (BT2-10) | 45000mAh · 2268Wh · DC 50.4V · ≈12.2 kg | Factory fit on the B2 — the largest pack in the BT2 series |
| Battery — Cold-Weather (BT2-11) | 37800mAh · 1852.2Wh · charges down to -20°C | Factory fit on the B2-W — fits the standard B2 too |
| Battery — High-Temp (BT2-12) | 40500mAh · 2041.2Wh · discharges up to +80°C | Full charge in about 1 hour with the B2 fast charger |
| Battery Chargers — Standard & Fast | Genuine Unitree chargers for the BT2 series | The fast charger refills the BT2-12 in about 1 hour |
| Leg Package | Complete replacement leg assembly | Genuine spare for fleet maintenance and repair |
| Wheeled Foot Kit | Official optional wheel feet | Swaps the B2 between legged and wheeled forms |
| Autonomous Charging Station | Optional dock for the B2's quick-swap battery system | Lets the robot return and recharge without an operator |
| Compute Expansion | Up to 3 additional units — Intel Core i7 or NVIDIA Orin NX | Official upgrades on top of the standard Intel i5 platform |
B2 Accessory Fit at a Glance
What fits the legged B2, per Unitree's official documentation. The battery bay is shared with the wheeled B2-W, but the two robots ship with different factory packs — the matrix below flags the one combination to avoid.
| Fits B2 | Notes | |
|---|---|---|
| Battery — Standard BT2-10 | Factory fit | The like-for-like spare for a standard B2 — not recommended for the B2-W |
| Battery — Cold-Weather BT2-11 | Fits | Factory fit on the B2-W; also the winter pack for a standard B2 |
| Battery — High-Temp BT2-12 | Fits | Heat-duty pack with 1-hour fast charging; B2-W fit not confirmed by Unitree |
| Battery Chargers — Standard & Fast | Standard charging for the BT2-10 and BT2-11; fast charging for the BT2-12 | |
| Leg Package | Genuine replacement leg assemblies for fleet maintenance | |
| Wheeled Foot Kit | Official option — swaps the B2 between legged and wheeled forms | |
| Autonomous Charging Station | Official optional dock — pairs with the quick-swap battery bay | |
| Compute Expansion — i7 / Orin NX | Official upgrade path over the standard Intel i5 platform |
Which B2 Accessory Do You Need?
Most B2 fleets start with power: a spare pack doubles effective session length, and rotating batteries through the quick-swap bay keeps the robot working through a full shift. Everything else depends on where your robot works and what it does for a living.
The three-version BT2 battery series — standard 2268Wh, cold-weather charging to -20°C, or high-temperature duty with 1-hour fast charging — plus the standard and fast chargers that keep them topped up.
The leg package gives fleet operators a genuine replacement assembly on the shelf, so a damaged joint doesn't idle a 60kg robot waiting on parts.
The wheeled foot kit switches the B2 between legged and wheeled forms — wheels for long flat runs, legs for stairs, rubble and slopes.
The autonomous charging station lets the B2 dock and recharge without an operator, while compute expansion adds up to three extra units — Intel Core i7 or NVIDIA Orin NX — for onboard AI workloads.
International Shipping for B2 Batteries and Parts
Every order ships via DHL or FedEx with tracking, door to door.
Lithium batteries travel as regulated air cargo in UN38.3-compliant packaging — battery-only parcels can take a few days longer than ordinary freight.
Chargers, leg packages and foot kits contain no lithium cells and ship as standard express freight; mixed orders get exact timing in your quote.