Xiaomi TW01-4S1P 14.6V 2.5Ah Robot Vacuum Replacement Battery
- Compatibility: Designed for the compact Xiaomi/Mijia STYTJ02YM robot vacuum and Xiaomi Mi Home robotic vacuum platform.
- Battery specification: 14.6V nominal voltage, 2.5Ah rated capacity, Grade-A 18650 cells in a 4S1P configuration.
- Charging requirement: Verified to work with the genuine Xiaomi charger or dock through model-specific BMS firmware.
- Ordering and support: Catalog MOQ is 100 units; private-label orders start at 500 units, with a 12-month warranty and shipping documents including UN38.3, IEC 62133, MSDS, and CE Declaration of Conformity.
Replacing the battery in the compact Xiaomi/Mijia robotic vacuum (model STYTJ02YM) is easy with this drop-in battery replacement for the Xiaomi robot vacuum. The TW01-4S1P is a 14.6V 2.5Ah pack (4S1P, 18650), and it’s been tested against the original Xiaomi battery with BMS handshake on the genuine charging base.
Dongguan Ruineng New Energy (Nuranu) makes the TW01-4S1P. They’ve been making high-tech custom batteries since 2012, and they produce the TW01-4S1P on a fully automated assembly line with 100% aging and end-of-line testing. It’s made for OEM clients, robot vacuum repair distributors, and private-label brands that need the same fit and fade-free runtime as the OEM at factory-direct pricing.
Compatible Host Tools
- Xiaomi Mi Robot Vacuum (compact 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 TW01-4S1P 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) · compact variant) for a true drop-in fit.
2. 18650 Cells, True 2.5Ah
Grade-A 18650 cells in a 4S1P configuration deliver a genuine 2.5Ah at 14.6V — 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 | TW01-4S1P |
| Compatible Robot Vacuum | Xiaomi / Mijia Robot Vacuum |
| OEM Series / Codes | Xiaomi / Mijia robot vacuum (STYTJ02YM) · compact variant |
| Nominal Voltage | 14.6V |
| Rated Capacity | 2.5Ah |
| Cell Type | 18650 · 2500mAh |
| Configuration | 4S1P |
| Housing Color | Black |
| Proprietary Mold | Yes (in-house) |
| Net Weight | Confirmed at order |
| Battery Dimensions | Confirmed at order |
| Qty per Carton | 48 pcs |
| Carton Gross Weight | Confirmed at order |
Packaging & Wholesale Logistics
The TW01-4S1P is shipped in retail-ready packaging (blister or color box) designed for resale in stores and international shipping. Every batch ships with UN38.3 transport test report, IEC 62133 safety certificate, MSDS, and CE Declaration of Conformity so you can get through customs easily 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 TW01-4S1P fit the compact Xiaomi / Mijia robot vacuum?
Yes, the TW01-4S1P is a Xiaomi robot vacuum battery replacement for the compact Mijia STYTJ02YM variant. It is a true 14.6V 2.5Ah pack that fits OEM-matched devices.
What is the MOQ for the TW01-4S1P replacement battery?
The standard MOQ is 100 units for the TW01-4S1P. 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 TW01-4S1P drop-in compatible with the original Xiaomi charger or dock?
Yes. The TW01-4S1P 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 TW01-4S1P battery. You don’t need any tools or modifications. It charges on your real Xiaomi charger or dock.
How long does the TW01-4S1P battery last per charge?
The TW01-4S1P delivers a true 2.5Ah at 14.6V, 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 TW01-4S1P 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?
The TW01-4S1P 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/Mijia robot vacuum pack, and it comes with a 12-month warranty.
What cells and configuration does the TW01-4S1P use?
The TW01-4S1P uses high-quality 18650 cells (2500mAh each) arranged in a 4S1P configuration for a nominal 14.6V and a true rated capacity of 2.5Ah. 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 TW01-4S1P?
All TW01-4S1P 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 TW01-4S1P packed for shipping?
The TW01-4S1P ships 48 pieces per master carton. The battery doesn’t have any dimensions. Every batch of these products has the necessary UN38.3 / IEC 62133 / CE documents.