Traxxas 4000mAh 11.1V 3S 25C LiPo ID Battery - All Models

Brand: Traxxas

Part Number: TRX2849X

£57.56 Web Price RRP £63.95

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This is the Traxxas Power Cell 11.1V 4000mAh 25C 3S LiPo Battery with iD Connector. The Traxxas 2849X 4000mAh Power Cell LiPo packs are ideal for Rustler VXL, Stampede 2WD VXL, Stampede 4x4 VXL, Bandit VXL, and Traxxas Funny Car models.

Power Cell LiPo packs are engineered to give the punch and on-demand power to reach the top speeds Traxxas models are built to achieve. Premium LiPo cells developed specifically for Traxxas feature oversized discharge tabs for maximum efficiency. The cells are hard-wired with 12-gauge Maxx Cable, eliminating the resistance and power-loss associated with plug-in wires. The packs’ semi-rigid construction results in a firm, rugged, and compact pack that does not require a hard case, and the center-wire configuration assures a pinch-free fit in Traxxas vehicles. 


  • Traxxas iD high-current connector
  • Semi rigid construction does not require a hard case and eliminates wire harness connectors that can loosen and fail.
  • Engineered specifically to fit Traxxas models
  • 12AWG multi strand wire is soldered directly to the LiPo cells eliminating increased resistance from bullet connectors and accidental reversed polarity connections.


  • Traxxas Power Cell 11.1V 4000mAh 25C LiPo 3S Battery with iD high-current connector and integrated balance plug 


  • LiPo charger equipped with iD connector (or with Traxxas 2938 iD LiPo charge adapter)


  • Configuration: 3S1P 
  • Continuous Discharge: 25C (100A)
  • Max Burst Rate: 50C (200A)
  • Watt Hours: 44.40
  • Charge Rate: 1C (4A)
  • Dimensions: 5.3 x 1.02 x 1.7" (135 x 26 x 43mm)
  • Weight: 11.1oz (316g)


  • Brand: Traxxas
  • Part No: TRX2849X
  • Voltage: 3S - 11.1v
  • Case Type: Soft Case
  • Connector: Traxxas

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How long would it last for if you went fast. How long would it last for if you went slow.
Asked by James on 15th November 2018

There's a lot of variables there... However we'd say in a typical car you'd expect around 20-25 mins runtime from one of these.

Answered by: Ben @ Wheelspin Models

Will this battery work with the old style connectors and will I need a new charger
Asked by Martin on 30th April 2019

Yes this will work in an older TRX model featuring non ID connectors.

Charger however you'd probably want to upgrade to a new Traxxas ID charger such as say TRX2970T otherwise you will not be able to balance charge properly

Answered by: Ben @ Wheelspin Models

Will this battery (4000mAh 11.1v 3-Cell 25C LiPo Battery) work on the Traxxas UDR?| +5000mAh is recommended on the box, but would this also work?
Asked by Hamza Omari on 27th April 2020

Yes this will work

Answered by: Ben @ Wheelspin Models

will this work in xl5 cars
Asked by Connor on 25th June 2020

No, this is too high voltage for the brushed XL-5 cars.

Answered by: Ben @ Wheelspin Models

Hi can you tell me the appox run time of this battery on a Rustler 4x4 vxl
Asked by Jeremy on 21st August 2020

I'd say around 20 mins or so depending on driving style

Answered by: Ben @ Wheelspin Models

would this work on atraxxas big foot
Asked by Deaken on 30th October 2020

Not if yours is brushed - it'll be 2S max on those

Answered by: Ben @ Wheelspin Models

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