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Robot Vacuum 14.4V · 2.5Ah
Eufy TW4-11 14.4V 2.5Ah
Eufy RoboVac Battery Replacement

Eufy TW4-11 14.4V 2.5Ah RoboVac Replacement Battery (11S / 15C / 30C)

Drop-in Eufy RoboVac battery replacement for the RoboVac 11 series. The TW4-11 is a 14.4V 2.5Ah pack (4S1P, 18650) verified against the original Eufy battery, fitting RoboVac 11 / 11S / 15C / 25C / 30C with OEM-matched cartridge fit and BMS handshake.

Voltage14.4V
Capacity2.5Ah
Cell Type18650 cells
Configuration4S1P
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Overview

Drop-in Eufy RoboVac battery replacement for the RoboVac 11 series. The TW4-11 is a 14.4V 2.5Ah pack (4S1P, 18650) verified against the original Eufy battery, fitting RoboVac 11 / 11S / 15C / 25C / 30C with OEM-matched cartridge fit and BMS handshake.

Manufactured by Dongguan Ruineng New Energy (Nuranu) — a high-tech custom battery factory since 2012 — the TW4-11 is produced under a fully automated assembly line with 100% aging and end-of-line testing. It is engineered for OEM clients, robot vacuum repair distributors, and private-label brands that need OEM-equivalent fit and fade-free runtime at factory-direct pricing.

Eufy TW4-11 14.4V 2.5Ah view 1Eufy TW4-11 14.4V 2.5Ah view 2Eufy TW4-11 14.4V 2.5Ah view 3Eufy TW4-11 14.4V 2.5Ah view 4

Compatible Eufy Models

  • Eufy RoboVac 11 / 11S / 11S Max robot vacuums
  • Eufy RoboVac 15C / 25C / 30C robot vacuums
  • TW4-11 latch form factor

Target Applications

  • Eufy RoboVac 11 Series Owners: A direct, fade-free Eufy RoboVac 11 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 TW4-11 an easy stock item for Eufy Eufy RoboVac 11 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 Eufy RoboVac 11 Series Fit

Injection-molded shell and latch geometry match the original Eufy RoboVac 11 Series pack (RoboVac 11 / 11S / 15C / 25C / 30C · TW4-11 latch) 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 14.4V — matched and aged for stable, fade-free runtime.

3. Verified BMS Handshake

BMS flashed with Eufy RoboVac 11 Series-specific firmware charges and reports correctly on the genuine Eufy charger — resolving 'not charging' faults of worn original packs.

Product Video

Factory assembly line, BMS testing, and TW4-11 fit demonstration footage. Contact sales for additional product videos.

Technical Specifications

FeatureSpecification
Replacement ModelTW4-11
Compatible Robot VacuumEufy RoboVac 11 Series
OEM Series / CodesRoboVac 11 / 11S / 15C / 25C / 30C · TW4-11 latch
Nominal Voltage14.4V
Rated Capacity2.5Ah
Cell Type18650 · 2600mAh
Configuration4S1P
Housing ColorBlack
Proprietary MoldYes (in-house)
Net WeightConfirmed at order
Battery DimensionsConfirmed at order
Qty per Carton48 pcs
Carton Gross WeightConfirmed at order

Packaging & Wholesale Logistics

The TW4-11 ships in retail-ready packaging (blister or color box) engineered for marketplace resale and international freight. Every batch ships with UN38.3 transport test report, IEC 62133 safety certificate, MSDS, and CE Declaration of Conformity for smooth customs clearance in EU, US, UK, AU, and JP markets.

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

Frequently Asked by Distributors

Does the TW4-11 fit the Eufy RoboVac 11S, 15C, 25C and 30C?
Yes. The TW4-11 is a direct Eufy RoboVac battery replacement for the 11 / 11S / 15C / 25C / 30C series — a true 14.4V 2.5Ah cartridge pack with OEM-matched fit.
What is the MOQ for the TW4-11 replacement battery?
Standard MOQ is 100 units for the TW4-11. Paid samples of 1–10 units are available for fit and BMS-handshake validation before a production order. Private-label or custom-spec runs start at 500 units.
Is the TW4-11 drop-in compatible with the original Eufy charger or dock?
Yes. The TW4-11 BMS is flashed with model-specific firmware so it charges and reports correctly on the genuine Eufy charger — state-of-charge, authentication, and safety lockouts behave like the OEM Eufy RoboVac 11 Series pack. Validated on 100% of units at end-of-line.
How do I replace the battery in my Eufy RoboVac 11 Series?
Replacing the Eufy RoboVac 11 Series battery is straightforward: power off the robot vacuum, release the battery latch or clip, remove the old pack, and fit the TW4-11 until it seats. No tools or modification needed — it charges on your genuine Eufy charger or dock.
How long does the TW4-11 battery last per charge?
The TW4-11 delivers a true 2.5Ah at 14.4V, matching or exceeding original-pack runtime. Actual runtime depends on power mode and accessory. Cells are matched and aged so the pack holds capacity over its full cycle life.
Why is my Eufy battery not charging or not holding charge — does a replacement fix it?
A pack that won't hold charge or won't charge usually means end-of-life cells or a failed BMS. A new TW4-11 with fresh Grade-A cells and a fresh BMS resolves 'not charging' and 'not holding charge' faults caused by a worn-out original pack.
Are these genuine Eufy batteries or replacements?
The TW4-11 is a high-quality aftermarket replacement — not an OEM Eufy-branded pack. It is built with Grade-A tier-1 cells, a model-specific BMS, and OEM-matched fit, validated against an original Eufy RoboVac 11 Series pack on 100% of units, and backed by a 12-month warranty.
What cells and configuration does the TW4-11 use?
The TW4-11 uses Grade-A 18650 cells (2600mAh each) in a 4S1P configuration for a nominal 14.4V and a true rated capacity of 2.5Ah. Cells are matched by capacity (±20 mAh) and internal resistance (±5 mΩ) before assembly. Preferred cell brand (Samsung / LG / Panasonic / BAK) can be specified at order.
What is the warranty on the TW4-11?
All TW4-11 replacement packs carry a 12-month warranty against manufacturing defects. Every batch ships with UN38.3 test report, IEC 62133 certificate, MSDS and CE Declaration of Conformity for smooth customs clearance worldwide.
How is the TW4-11 packed for shipping?
The TW4-11 ships 48 pcs per master carton. Battery dimensions None. Every batch ships with full UN38.3 / IEC 62133 / CE documentation.

Need a Custom Quote or Technical Details?

Our engineering team is ready to discuss specifications, certification, MOQ, and OEM / private-label customization for the TW4-11.

✉ Email Sales 📱 WhatsApp ☎ +86 13823274651

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