Unitree B2 Charger
Genuine Unitree B2 Charger (B2-CHARGER) — the factory charger for the BT2-10, BT2-11 and BT2-12 batteries, shipped in the box with every B2, with worldwide 100–240V input.
- Unitree B2
- Unitree B2-W
About the Unitree B2 Charger
The Unitree B2 Charger (B2-CHARGER) is the official charger for the B2's BT2 battery series — the packs that power both the legged B2 and the wheeled B2-W. Every B2 ships from the factory with one of these in the box, so this page exists for the moment every B2 operator eventually meets: the charger stays at base while the fleet grows, or a rotation plan needs a second unit. It is the same part Unitree assigns to the robot, so there is no version to cross-check.
It charges on the bench: slide the BT2 pack out of the B2's bay, connect it to the charger, and the battery's own BMS manages the charge curve end to end. The charger runs on standard mains power worldwide, so the same unit moves between depots, demo venues and deployment sites — depending on your outlet type, a simple plug adapter is all it takes.
A B2's working rhythm is built around swappable power: one pack runs the robot while the other refills on the bench. With the robot's multi-hour endurance, a second charger and a spare pack keep a crew charging and working in parallel instead of waiting — the setup most B2 fleets settle on once a second battery joins the kit.
How Long Does a B2 Battery Take to Charge?
One charger serves all three BT2 packs — the only thing that changes is how big the pack is. Times below follow Unitree's battery-side charging specifications, and the BT2-11's figure scales with its smaller capacity on the same charger.
| BT2-10 · 45,000mAh | BT2-11 · 37,800mAh | BT2-12 · 40,500mAh | |
|---|---|---|---|
| Pack energy | 2268Wh | 1852.2Wh | 2041.2Wh |
| Full charge | ≈3 hours | ≈2.5–3 hours | ≈1 hour |
| Notes | Standard pack, ships with the B2 | Cold-weather pack, ships with the B2-W; charges down to -20°C | High-temp pack with 1-hour fast charging |
One Charger for B2 and B2-W
The legged B2 and the wheeled B2-W share the same BT2 battery platform, and the same B2-CHARGER serves both robots and all three pack versions — there is no version split to worry about. The packs slide into the same bay, charge on the same bench unit, and the BT2-11's ability to charge at twenty below zero comes from the pack, not from a different charger.
It is not a cross-model Unitree charger, though. The Go2, G1 and R1 families run their own batteries at different voltages with different connectors, so none of those chargers are interchangeable with this one.
This is not the B2 Contact Charger Kit
This listing is the wall charger that refills a BT2 pack on the bench. The B2-CHARGER-KIT is a different Unitree product — a contact charging dock the robot drives onto for autonomous recharging. Looking for hands-free charging in the field? Ask us about availability.
Specifications
| Part number | B2-CHARGER |
| Input | 100–240V ~ 50/60Hz |
| Output | 58.8V ⎓ |
| Charge time — BT2-10 | ≈3 hours |
| Charge time — BT2-11 | ≈2.5–3 hours |
| Charge time — BT2-12 | ≈1 hour (fast charge) |
| Compatible batteries | Unitree BT2-10 · BT2-11 · BT2-12 |
| In the box | 1 × Unitree B2 Charger |
Shipping, Quality Guarantee & Charger Care
Unlike the batteries it powers, the charger itself contains no lithium cells, so it ships as standard cargo with no battery-class air freight handling — worldwide delivery via DHL or FedEx with the transit time confirmed in your quote.
Every Unitree B2 Charger is 100% quality-inspected before it ships, so it arrives in perfect working order. Keep it for bench use with BT2 packs only, indoors and dry, and let the packs' own BMS handle the rest.
Last updated: October 2026.
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