Xiaomi TW01-4S2P 14.4V 5.0Ah High-Capacity Robot Vacuum Replacement Battery
- The TW01-4S2P is a 14.4V, 5.0Ah 4S2P replacement battery using eight 2500mAh 18650 cells.
- It is designed to fit Xiaomi/Mijia STYTJ02YM and Mi Home robotic vacuum platforms without tools or modifications.
- Model-specific BMS firmware supports charging, state-of-charge reporting, authentication, and safety lockouts on the genuine Xiaomi charger or dock.
- Catalog orders start at 100 units; paid samples of 1–10 units are available for fit and BMS-handshake validation.
This is a high-capacity battery for the Xiaomi/Mijia robotic vacuum platform (STYTJ02YM). The TW01-4S2P is a 14.4V 5.0Ah pack (4S2P, 18650) with doubled parallel capacity for longer cleaning time. It has been tested against the original Xiaomi battery with BMS handshake on the genuine charging base.
The TW01-4S2P 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 Mi Robot Vacuum (high-capacity variant)
- Mijia STYTJ02YM robot vacuum
- Xiaomi Mi Home robotic vacuum platform
Target Applications
- Xiaomi / Mijia Robot Vacuum Owners: A direct, fade-free Xiaomi / Mijia Robot Vacuum 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 TW01-4S2P an easy stock item for Xiaomi Xiaomi / Mijia Robot Vacuum 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 / Mijia Robot Vacuum Fit
Injection-molded shell and latch geometry match the original Xiaomi / Mijia Robot Vacuum pack (Xiaomi / Mijia robot vacuum (STYTJ02YM) · high-capacity variant) for a true drop-in fit.
2. 18650 Cells, True 5.0Ah
Grade-A 18650 cells in a 4S2P configuration deliver a genuine 5.0Ah at 14.4V — matched and aged for stable, fade-free runtime.
3. Verified BMS Handshake
BMS flashed with Xiaomi / Mijia Robot Vacuum-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 | TW01-4S2P |
| Compatible Robot Vacuum | Xiaomi / Mijia Robot Vacuum |
| OEM Series / Codes | Xiaomi / Mijia robot vacuum (STYTJ02YM) · high-capacity variant |
| Nominal Voltage | 14.4V |
| Rated Capacity | 5.0Ah |
| Cell Type | 18650 · 2500mAh |
| Configuration | 4S2P |
| Housing Color | Black |
| Proprietary Mold | Yes (in-house) |
| Net Weight | Confirmed at order |
| Battery Dimensions | Confirmed at order |
| Qty per Carton | 30 pcs |
| Carton Gross Weight | Confirmed at order |
Packaging & Wholesale Logistics
The TW01-4S2P is packaged for retail (in a blister or color box) so it can be resold and shipped 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 TW01-4S2P fit the Xiaomi / Mijia STYTJ02YM robot vacuum?
Yes, the TW01-4S2P is a high-capacity Xiaomi robot vacuum battery replacement for the Mijia STYTJ02YM and Mi Home robotic vacuum platform. It is a true 14.4V 5.0Ah pack that fits OEM standards.
What is the MOQ for the TW01-4S2P replacement battery?
The standard MOQ is 100 units for the TW01-4S2P. You can get paid samples of 1–10 units to make sure they fit and to validate the BMS-handshake before placing an order. Private-label or custom-spec runs start at 500 units.
Is the TW01-4S2P drop-in compatible with the original Xiaomi charger or dock?
Yes. The TW01-4S2P 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 original Xiaomi/Mijia Robot Vacuum 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 / Mijia Robot Vacuum?
Replacing the Xiaomi/Mijia Robot Vacuum 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 TW01-4S2P battery. You don’t need any tools or modifications. It charges on your real Xiaomi charger or dock.
How long does the TW01-4S2P battery last per charge?
The TW01-4S2P delivers a true 5.0Ah at 14.4V, matching or exceeding the runtime of the original pack. How long the device 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 properly, it’s likely that the batteries are nearing the end of their lifespan or the battery management system (BMS) has malfunctioned. The new TW01-4S2P with fresh Grade-A cells and a fresh BMS solves the “not charging” and “not holding charge” problems caused by a worn-out original pack.
Are these genuine Xiaomi batteries or replacements?
If your battery pack won’t hold a charge or charge properly, it’s likely that the batteries are nearing the end of their lifespan or the battery management system (BMS) has malfunctioned. The new TW01-4S2P with fresh Grade-A cells and a fresh BMS solves the “not charging” and “not holding charge” problems caused by a worn-out original pack.
What cells and configuration does the TW01-4S2P use?
The TW01-4S2P uses high-quality 18650 cells (2500mAh each) arranged in a 4S2P configuration for a nominal 14.4V and a true rated capacity of 5.0Ah. 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 TW01-4S2P?
All TW01-4S2P replacement packs have a 12-month warranty against 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 TW01-4S2P packed for shipping?
The TW01-4S2P comes in master cartons of 30 pieces. The battery doesn’t have any dimensions. Every batch of these products has the necessary UN38.3 / IEC 62133 / CE documents.