Xiaomi TW01-5S 18V 3.2Ah Roborock S-Series Robot Vacuum Replacement Battery
- The TW01-5S is an 18V, 3.2Ah aftermarket battery replacement built with 3200mAh 18650 cells in a 5S1P configuration.
- It is designed for Xiaomi Roborock S-series platforms, including Roborock S5, S6, and S7.
- Its BMS firmware is verified to work with the genuine Xiaomi charger or dock, helping address worn-pack “not charging” and reduced-runtime issues.
- Standard MOQ is 100 units, while paid samples of 1–10 units are available for fit and BMS-handshake validation.
Replace the battery in your Xiaomi robot vacuum on the Roborock S-series platform. The TW01-5S is an 18V 3.2Ah pack built on high-capacity 3200mAh 18650 cells (5S1P). It has been verified against the original Roborock battery with BMS handshake on the genuine charging dock.
The TW01-5S is made by Dongguan Ruineng New Energy (Nuranu), a high-tech custom battery factory since 2012. It is made on a fully automated assembly line where each battery is tested at the end of the line. It is designed for Original Equipment Manufacturer (OEM) clients, robot vacuum repair distributors, and private-label brands that need the same fit and fade-free runtime as OEM products at factory-direct pricing.
Compatible Host Tools
- Xiaomi Roborock S-series robot vacuums
- Roborock S5 / S6 / S7 platform
- Xiaomi Mi Home Roborock robotic vacuum platform
Target Applications
- Xiaomi Roborock S-Series Owners: A direct, fade-free Xiaomi Roborock S-Series battery replacement that restores full runtime when the original pack ages.
- Robot Vacuum Repair & Service Shops: OEM-matched fit and verified charger handshake make the TW01-5S an easy stock item for Xiaomi Xiaomi Roborock S-Series repairs.
- Private-Label & E-commerce Sellers: Sourced with your branding and retail-ready packaging (blister / color box) for Amazon FBA and marketplace resale.
Core Technical Advantages
1. OEM-Matched Xiaomi Roborock S-Series Fit
Injection-molded shell and latch geometry match the original Xiaomi Roborock S-Series pack (Xiaomi Roborock S-series platform) for a true drop-in fit.
2. 18650 Cells, True 3.2Ah
Grade-A 18650 cells in a 5S1P configuration deliver a genuine 3.2Ah at 18V — matched and aged for stable, fade-free runtime.
3. Verified BMS Handshake
BMS flashed with Xiaomi Roborock S-Series-specific firmware charges and reports correctly on the genuine Xiaomi charger — resolving ‘not charging’ faults of worn original packs.
Technical Specifications
| Feature | Specification |
|---|---|
| Replacement Model | TW01-5S |
| Compatible Robot Vacuum | Xiaomi Roborock S-Series |
| OEM Series / Codes | Xiaomi Roborock S-series platform |
| Nominal Voltage | 18V |
| Rated Capacity | 3.2Ah |
| Cell Type | 18650 · 3200mAh |
| Configuration | 5S1P |
| Housing Color | Black |
| Proprietary Mold | Yes (in-house) |
| Net Weight | Confirmed at order |
| Battery Dimensions | Confirmed at order |
| Qty per Carton | 40 pcs |
| Carton Gross Weight | Confirmed at order |
Packaging & Wholesale Logistics
The TW01-5S is shipped in packaging that is ready for retail stores to sell it (in a blister or a color box). This packaging is designed for reselling the product and for shipping internationally. Every batch of products is shipped with UN38.3 transport test reports, IEC 62133 safety certificates, MSDSs, and CE Declaration of Conformity. This helps ensure that customs can easily clear the products in the EU, US, UK, AU, and JP markets.
| Item | Details |
|---|---|
| MOQ | 100 units (catalog) · 500 units (private label) |
| Lead Time | 25–35 days standard · 18–22 days expedited |
| Payment | 30% T/T deposit + 70% against B/L |
| Warranty | 12 months |
Product Video
Frequently Asked by Distributors:
Does the TW01-5S fit the Xiaomi Roborock S-series robot vacuum?
Yes, the TW01-5S is a Xiaomi/Roborock robot vacuum battery replacement for the Roborock S-series. It is a true 18V 3.2Ah pack on high-capacity 3200mAh cells with an OEM-matched fit.
What is the MOQ for the TW01-5S replacement battery?
The standard MOQ is 100 units for the TW01-5S. You can get paid samples of 1–10 units to make sure they fit and to validate the BMS-handshake before placing an order for production. Private-label or custom-spec runs start at 500 units.
Is the TW01-5S drop-in compatible with the original Xiaomi charger or dock?
Yes. The TW01-5S BMS has model-specific firmware, so it charges and reports correctly on the real Xiaomi charger. The state-of-charge, authentication, and safety lockouts work like the OEM Xiaomi Roborock S-Series pack. It is checked and approved for all units at the end of the production line.
How do I replace the battery in my Xiaomi Roborock S-Series?
Replacing the Xiaomi Roborock S-Series battery is easy. First, power off the robot vacuum. Next, release the battery latch or clip. Then, remove the old battery pack and insert the new TW01-5S battery. You don’t need any tools or modifications. It charges using your Xiaomi charger or dock.
How long does the TW01-5S battery last per charge?
The TW01-5S delivers a true 3.2Ah at 18V, matching or exceeding the runtime of the original pack. How long it actually lasts depends on the power mode and the accessory. The cells are matched and aged so that the pack will have the same capacity for its full cycle life.
Why is my Xiaomi battery not charging or not holding charge — does a replacement fix it?
If your battery pack won’t hold a charge or charge anything, it’s probably because the batteries are dead or the battery management system (BMS) is broken. A new TW01-5S with fresh Grade-A cells and a fresh BMS solves the problems of “not charging” and “not holding charge” that are caused by an original pack that is worn out.
Are these genuine Xiaomi batteries or replacements?
The TW01-5S is a high-quality aftermarket replacement — it is not an OEM Xiaomi-branded pack. It is built with high-quality cells, a custom battery management system, and is designed to fit specific models. It has been tested against an original Xiaomi Roborock S-Series pack on 100% of units and is backed by a 12-month warranty.
What cells and configuration does the TW01-5S use?
The TW01-5S uses high-quality 18650 cells (3200mAh each) arranged in a 5S1P configuration, providing a nominal 18V and a true rated capacity of 3.2Ah. Before assembly, cells are matched based on their capacity (±20 mAh) and internal resistance (±5 mΩ). You can specify your preferred cell brand (Samsung, LG, Panasonic, or BAK) when you place your order.
What is the warranty on the TW01-5S?
All TW01-5S replacement packs come with a 12-month warranty that covers manufacturing defects. Every batch of products is shipped with the following documents:
– UN38.3 test report
– IEC 62133 certificate
– MSDS
– CE Declaration of Conformity
These documents are needed to clear customs worldwide.
How is the TW01-5S packed for shipping?
The TW01-5S comes in master cartons of 40 pieces. The battery doesn’t have any dimensions. Every batch of these products has the necessary UN38.3 / IEC 62133 / CE documents.