DuraTrax LiPo Onyx 2S 7.4V 4000mAh 25C Hard Case Battery with Traxxas Plug DTXC1862 View larger

DuraTrax LiPo Onyx 2S 7.4V 4000mAh 25C Hard Case Battery with Traxxas Plug DTXC1862


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For All Shipments: Special labeling requirements are needed to safely transport any Lithium products. Certain large Lithium Batteries will always require HazMat handling and will only ship via Fedex. If you would like to know more about FedEx and the safety precautions taken when transporting Lithium Batteries, please refer to the FedEx guidelines.

International Shipments: Lithium Batteries are regulated as HAZMAT (Hazardous Material) products and can be dangerous if not packaged properly for transportation. In smaller quantities, Lithium Batteries can be shipped via DHL without applying a HAZMAT fee. If you'd like to ship more than 2 Lithium Batteries, a HAZMAT fee will be applied for transportation. Please note that DHL only allows transportation of HAZMAT / Dangerous Goods to specific countries, some of which have limited service areas.

The US Postal Service prohibits international mailing of Lithium Batteries, as well as electronic devices that contain Lithium Batteries. These new regulations also prohibit shipments to or from Army, Fleet, and Diplomatic Post Offices. Because of these regulations, no US Postal Service shipping options will be available during checkout.

Domestic Shipments: Both FedEx and the US Postal Service are available as shipping carriers for most Lithium Batteries and electronic devices containing Lithium Batteries. Please note that the US Postal Service has a limit of three batteries per shipment; you can refer to the Domestic Mail Manual for further information.


Fuel is classified as a "flammable" liquid. RC Planet can transport limited quantities of flammable liquid under ORM-D (Other Regulated Materials for Domestic transport). Shipping under ORM-D means that the product will ship via FedEx Ground only. For larger quantities of fuel (Example: case quantities), it must be transported under HAZMAT. Transporting as HAZMAT means that the amount of fuel is considered hazardous and will be subject to shipping by Ground services, including a HAZMAT fee for the special transportation. Fuel cannot ship outside of the US.

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Rocket Motors, Rocket Igniters and Rockets are classified as Toy Propellant Devices and can only be transported through Surface Mail with the US Postal Services Parcel Post. FedEx does not transport Rocket Motors, Rocket Igniters and Rockets. Please note that FedEx will not show up as a delivery option during checkout.

International Shipping Restriction


Due to circumstances and regulations that are beyond RC Planet's control, batteries cannot ship outside of the US when using the United States Postal Service as the shipping provider. However, RC Planet can ship batteries internationally using DHL International, but the quantity cannot exceed a total of 2 batteries with a capacity of 5000mah maximum. Unfortunately we are currently unable to ship this item to APO/FPO addresses and apologize for the inconvenience.


Due to distributor restrictions, the following brands are not available for sale outside of the 50 United States: Losi, Team Losi Racing, Blade, ParkZone, ECX, Hobby Zone, E-Flite, Vaterra, Dynamite, Pro Boat, Spektrum, JR Radio, Orion, and Hangar 9.

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Shipping Rates


For anyone who wants more run time and performance, there’s no better time to move up to LiPo power — now that Onyx offers high-quality, true-rated LiPo packs at very affordable prices. Check out the listings below. You’ll find Onyx LiPo batteries available in the capacities, configurations and discharges you need for a wide range of applications, from upgrading your RTR to taking part in racing events. Choose soft case packs of lower weight and smaller size, or packs with impact- and puncture-resistant hard ABS cases. All include built-in discharge lead and balance connector.

Works great for DuraTrax motorcycles as well as other cars, trucks and boats or any other application requiring a stick pack with a Deans plug.
Protective ABS case has the same dimensions as a six cell NiMH stick pack.
Wired for balancing with JST XH (ElectriFly Style) balance plug.

Cell balancer such as the Great Planes Equinox Balancer for balance charging
LiPo compatible charger such as the Onyx 230 AC/DC Charger


Fact sheet

Battery Type LiPo
Voltage 7.4V
Plug Type Traxxas Plug
Free Shipping Free Shipping

Tech Specs

Capacity: 4000mAh
Number of Cells in Series: 2
Rated Voltage: 7.4V
Continuous Discharge Rate: 25C
Maximum Recommended Charge Current: 1C (4.0 amps)
Pack Dimensions: 5.3 x 1.8 x 0.9" (135 x 45 x 24mm)
Discharge Lead/Connectors: 12AWG 3.9" (100mm) Deans
Balancing Connector: ElectriFly
Weight: 9oz (256g)
Watt Hours: 30Wh

Reviews (2)

"JustinM "

"Perfect Fit!"


"James Henderson"

"DuraTrax LiPo Onyx 2S 7.4V 4000mAh 25C"

"Good price, don't last as long as the Traxxas batteries."

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