Traxxas TRX-4m Spare LiPo Battery - 750mAh 7.4V 2s 20C

Brand: Traxxas

Part No: TRX2821

£17.58 ~~RRP £18.50~~

In Stock: Usually ships same day

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Traxxas Certified iD-equipped LiPo batteries are engineered to deliver the punch and on-demand power that Traxxas models are built to achieve. The TRX2821 is a compact 2S (7.4V) 750mAh 20C pack with the Traxxas iD connector for simple, secure installation and reliable performance.

Part of the Traxxas Power Cell range, this spare LiPo helps maximise your model’s performance potential while keeping setup straightforward.

Key Specifications

Capacity: 750mAh
Voltage: 7.4V (2S)
Discharge Rating: 20C
Connector: Traxxas iD
Age Recommendation: 14+
Colour: Black
Material: Lithium
Shipping Weight: 0.05kg
Part Number: TRX2821

Suggested compatibility: Traxxas TRX-4M models.

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Traxxas Certified iD-Equipped LiPo batteries are engineered to provide the punch and on-demand power for reaching the top speeds that Traxxas models are built to achieve. Traxxas Power Cell iD-Equipped LiPo batteries are engineered specifically to fit Traxxas models and maximize their full performance potential. Only Traxxas gives you more of what you want most: simple installation, a great price, and the most speed and run time available.

Manuals & Parts Explosions:

Traxxas TRX-4m Spare LiPo Battery - 750mAh 7.4V 2s 20C Tech Specs:

Shipping Weight: 0.05kg / 0.11lbs

Connector: Traxxas
Cells: 2S (7.4V)
Voltage: 7.4V
Capacity: 750mAh
Age Recommendation: 14+
Colour: Black
Material: Lithium

Key Info:

Brand: Traxxas
Part No: TRX2821
Barcode: 020334282101

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Questions & Answers

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Is there an adaptor for this yet so it can be put into storage mode? I’ve read online that the advice is the run the battery down to the first flashing red light on the ECM and this will leave the battery with the correct voltage mode to store, is this correct? Thanks

Luke / 11th January 2026

Yes this will fit those batteries so you can use a traxxas id charger with storage settings TRX2821-PORT

Steve @ Wheelspin Models

Will Traxxas bring out these connections so we can charge these small batteries on a normal lipo charger? Can’t put into storage mode on the USB charger. Or is there an adaptor yet? Thanks

Neil / 25th April 2023

They have not given any information regarding this and there is no adaptor available currently.

Steve @ Wheelspin Models

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