Hero image 0 of 14.4V 4000mAh Battery for Eufy RoboVac 11 11S MAX 30 15T 35C TW4-11 14.4v 4.0Ah Li-ion Replacement Battery, 0 of 9
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14.4V 4000mAh Battery for Eufy RoboVac 11 11S MAX 30 15T 35C TW4-11 14.4v 4.0Ah Li-ion Replacement Battery
Key item features
- Battery Specifications: Battery type: Li-ion, Voltage: 14.4V, Capacity: 4000mAh/4.0Ah 57.6Wh
- Compatible Models: Suitable for Ecovacs Deebot N79, N79S, DN622, DN621, and Eufy RoboVac 11, 11S, 11S MAX, 15T, 30, 30C Max, 15C, 15C MAX, 12, 35C
- Safety Features: Built-in protection against overcharge, overdischarge, overcurrent, and short circuit
- Professional Testing: CE & RoHS certified, tested to match and exceed OEM specifications
- Factory Direct: Produced by Huajiang Tech with strict quality control and professional engineering oversight
- Package Contents: Includes 1* 4000mAh 14.4V Lithium Battery Replacement and 1* Battery User Guide
Generated by AI
Specs
- Volts14.4 V
- Battery capacity4000 mAh
- Compatibilityeufy, ECOVACS
- Model nameHuajiang Tech
- ManufacturerTENWAY
- Height1.45 in
Current price is USD$18.00
Price when purchased online
- Free shipping
Free 30-day returns
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Sold and shipped by Huajiang Tech
4.194392523364486 stars out of 5, based on 535 seller reviews(4.2)535 seller reviews
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About this item
Product details
Specifications:
Chemistry: Li-ion
Brand: Replacement for Eufy / Ecovacs
Model No.: TW4-11
Condition: Brand new
Sub-Type: Replacement Battery
Capacity: 4000mAh/4.0Ah 57.6Wh
Voltage (V): 14.4V
Item Weight: 280g
Fit Models:
Compatible with Ecovacs Deebot N79, Deebot N79S, Deebot DN622, Deebot DN621, Eufy RoboVac 11, RoboVac 11S, RoboVac 11S MAX, RoboVac 15T, RoboVac 30, RoboVac 30C Max, RoboVac 15C, RoboVac 15C MAX, RoboVac 12, RoboVac 35C.
Package Included:
1* 4000mAh 14.4V Lithium Battery Replacement for Eufy/Ecovacs
1*Battery User Guide
- Product Details: Battery type: Li-ion , Voltage: 14.4V , Capacity: 4000mAh/4.0Ah 57.6Wh
- Applicable Models: Replacement for Ecovacs Deebot N79 Deebot N79S Deebot DN622 Deebot DN621 Eufy RoboVac 11 RoboVac 11S RoboVac 11S MAX RoboVac 15T RoboVac 30 RoboVac 30C Max RoboVac 15C RoboVac 15C MAX RoboVac 12 RoboVac 35C
- Battery Protections: Made with high quality battery cells,Built-in protection against overcharge, overdischarge, overcurrent provides short circuit protection and constant voltage circuit.
- Professional Testing: CE & RoHS certification,Tested by manufacturer to match and exceed OEM products specifications.
- FACTORY SALE: Huajiang Tech has our own factory so we can control strictly during production. There’re professional engineers to ensure products’ quality and safety. Our mission is quality and customer first. Every one of our replacement batteries are tested to meet OEM specifications.
- WARRANTY & SUPPORT: 6-Months Warranty, 30 days money back guarantee. Free exchange for any quality problems. Great before and after sales services. Please contact us if you have any problems for our goods. Buy with confidence!
info:
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Specifications
Volts
14.4 V
Battery capacity
4000 mAh
Brand
Huajiang Tech
Compatibility
eufy, ECOVACS
Warranty
Warranty information
This warranty covers any defects in materials or workmanship, including installation, with the exceptions of fading or discoloration caused by exposure to sunlight or chemicals. This warranty runs for five years from the date your carpet is installed. Counterpoint will either replace your carpet with new carpet of similar composition and price, or refund the full purchase price of your carpet, whichever you prefer. Contact Counterpoint at 800-867-5309.
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Warnings
Ingestion Hazard
This product contains a battery. Death or serious injury can occur if ingested. A swallowed battery can cause Internal Chemical Burn in as little as 2 hours. Keep new and used batteries OUT OF REACH OF CHILDREN. Seek Immediate medical attention if a battery is suspected to be swallowed or inserted inside any part of the body.
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Customer ratings & reviews
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Showing 1-3 of 9 reviews
May 4, 2025
Peg
5 out of 5 stars review
Verified Purchase
My robovac lives again!
This battery gave new life to my Eufy robovac! She was only running about 30 minutes and my floors were not happy. I purchased this guy and now she's back to her optimum 2 hour run cycle. It was a perfect fit for my Eufy Robot Vacuum 11s Max. It was simple to get the other battery out and replace. Even came with a charge!
Incentivized Review
Helpful?3477WUKSCD40104626563
Oct 14, 2025
Patricia
5 out of 5 stars review
Verified Purchase
This is second time buying. Easy to install. Happy with the price.
Helpful?3477WUKSCD40104626563
Jan 17, 2026
Bruce
5 out of 5 stars review
Verified Purchase
New life!
Completely revived my dead Eufy RoboVac!
Helpful?3477WUKSCD40104626563
