Traxxas Power Cell 3300mAh 8.4V 7-Cell NiMH Battery Flat TRX2940X

Overview

The Traxxas NiMH 8.4V 3300mAh 7-Cell Power Cell Battery (TRX2940X) is a premium energy solution designed for RC enthusiasts across the UK who demand reliable performance without compromise. Whether you're running a ready to run RC car, a bashing short course truck, or a scale crawler, this battery pack delivers the consistent power and extended runtime that serious hobbyists expect. As part of Traxxas' acclaimed 3000-series Power Cell range, this NiMH battery combines affordability with professional-grade engineering, making it an ideal choice for both experienced competitors and dedicated weekend bashers exploring the world of RC vehicles.

Built with low-resistance cells and Traxxas' exclusive iD battery management system, this 8.4-volt flat-pack configuration offers excellent "punch" and sustained performance throughout your driving sessions. The flexible, silicone-jacketed 12-gauge wiring and heavy-duty welded tabs ensure maximum power transfer and durability, even during the most demanding RC driving conditions. This battery is particularly well-suited for popular Traxxas models including the Slash Ultimate 4x4 VXL short course truck, standard Slash VXL variants, and the iconic TRX-4 Defender 4WD rock crawler, making it a versatile power solution for your RC collection.

Unlike cheaper battery alternatives that compromise on build quality or performance consistency, the Traxxas Power Cell TRX2940X delivers a rewarding battery experience backed by genuine manufacturer engineering. The iD connector system simplifies charging and battery management, whilst the proven NiMH chemistry provides stable voltage delivery, temperature stability, and a proven track record in demanding RC applications across the UK and beyond.

Key Features

• Traxxas iD Battery System — The exclusive iD connector and management technology automatically recognises your battery and optimises charging parameters, eliminating guesswork and protecting your investment through intelligent power management and compatibility verification across all compatible Traxxas chargers and models.
• 3300mAh Capacity — With 3300 milliamp-hours of energy storage, this battery delivers extended runtime for your RC car, truck or crawler, allowing you to enjoy longer driving sessions before needing to recharge, making it perfect for competitive racing or recreational bashing.
• 8.4V 7-Cell NiMH Chemistry — The 7-cell NiMH configuration provides a proven, reliable power source with stable voltage delivery, excellent temperature characteristics, and predictable performance across a wide range of driving conditions and ambient temperatures.
• Low-Resistance Cells — Engineered with low-resistance internal construction, these premium cells minimise voltage sag during high-demand acceleration and cornering, ensuring your RC vehicle maintains maximum power and responsiveness even during sustained high-performance driving.
• Flexible Silicone-Jacketed 12-Gauge Wire — The robust 12-gauge power leads feature flexible silicone insulation that resists cracking and maintains conductivity through repeated flexing, vibration and thermal cycling, ensuring consistent electrical performance throughout the battery's operational lifespan.
• Heavy-Duty Welded Tabs — Military-grade welding techniques bond the internal cell connections with absolute reliability, eliminating the risk of loose connections or internal failures that plague cheaper battery alternatives, guaranteeing maximum current delivery and safety.
• Flat-Pack Configuration — The compact, low-profile flat design fits securely into battery compartments on touring cars, short course trucks, and crawlers, optimising weight distribution and centre of gravity for improved handling characteristics and driving dynamics.
• Affordable Performance — Positioned at an accessible price point without sacrificing build quality or engineering excellence, this battery represents exceptional value for RC car UK hobbyists seeking dependable power without the premium cost of alternative chemistries.

Technical Performance

The Traxxas NiMH 8.4V 3300mAh 7-Cell Power Cell Battery represents the pinnacle of brushed and brushless RC battery technology for mid-range performance applications. With a nominal voltage output of 8.4 volts across seven individual cells, this pack delivers sufficient electrical potential to power everything from entry-level brushed motors through to modern brushless systems in 1/10 scale short course trucks, racing buggies, and scale crawlers. The 3300 milliamp-hour capacity ensures realistic 20-45 minute runtime depending on your specific RC vehicle's motor configuration, gearing, and driving style. The low-resistance cell construction minimises voltage sag during peak current draw, maintaining consistent power delivery during aggressive acceleration, which is particularly important for competitive short course truck racing where split-second throttle response determines race outcomes. The flexible 12-gauge silicone-jacketed power leads provide exceptional current capacity whilst remaining pliable enough for installation in confined battery boxes, whilst the heavy-duty welded tabs guarantee perfect electrical contact with zero resistance losses at the cell-to-terminal connection points. This battery pack measures 158mm in length, 26mm in height, and 48mm in width, creating a compact, lightweight form factor that optimises weight distribution in competitive RC vehicles. The Traxxas iD connector system integrates seamlessly with all modern Traxxas chargers and balancers, automatically configuring charging profiles and battery protection parameters to maximise cycle life and safety. Whether you're charging from a wall outlet, a car 12-volt auxiliary port, or a field charger during competition events, the intelligent iD system handles all configuration automatically, making battery management genuinely effortless for busy RC enthusiasts.

What's in the Box

• Traxxas NiMH 8.4V 3300mAh 7-Cell Power Cell Battery with iD Connector

Frequently Asked Questions

• Is the Traxxas NiMH 8.4V 3300mAh battery compatible with my Traxxas RC model? — This battery is fully compatible with numerous popular Traxxas vehicles including the Traxxas Slash Ultimate 4x4 VXL short course truck, all Traxxas Slash VXL variants (available in orange, red, blue, and green colour options), and the Traxxas TRX-4 Defender 4WD crawler in all colour configurations. The Traxxas iD connector ensures automatic compatibility verification, so you can charge with confidence knowing the battery recognises your specific vehicle requirements. Always verify your model number against the compatibility list provided by Traxxas or consult the vehicle manual to confirm battery suitability.
• What is the difference between NiMH and LiPo batteries for RC cars UK? — NiMH batteries like this Traxxas Power Cell offer proven reliability, excellent temperature stability, superior safety margins, and the ability to tolerate overcharging and deep discharge without permanent damage, making them ideal for beginners, bashers, and racers who prioritise durability over ultimate peak performance. LiPo batteries deliver higher voltage-per-cell, lighter weight, and slightly extended runtime, but require professional chargers, careful monitoring, and proper storage protocols. The NiMH choice represents the safer, more forgiving option for general RC car UK enthusiasts.
• How long does this battery take to charge? — Charge time depends entirely on your charger's output capacity and configuration, which the Traxxas iD system automatically optimises. Standard chargers typically require 60-90 minutes for a complete full charge from completely depleted, whilst rapid chargers can restore the battery in 30-45 minutes. Always consult your specific charger's manual for exact charge time specifications and recommended charging profiles for NiMH batteries.
• What runtime should I expect from this 3300mAh battery? — Runtime varies significantly based on your RC vehicle's motor configuration, gear ratio, driving style, battery age, and ambient temperature. Generally, expect 20-45 minutes of continuous driving with typical brushless motor setups in competitive short course truck racing, or 30-50 minutes with standard brushed motor configurations during recreational bashing. Higher gearing and more aggressive throttle application naturally reduces runtime, whilst gentler driving extends battery endurance.
• Is this battery suitable for beginners to RC cars UK? — Absolutely. The Traxxas NiMH Power Cell is perfectly suited for RC beginners because NiMH chemistry is forgiving, the iD system eliminates charging confusion, and the battery is rugged enough to tolerate the mistakes that naturally accompany the learning curve. Unlike LiPo batteries which demand specialist knowledge, this NiMH pack simply charges in any compatible Traxxas charger and performs reliably with zero special handling requirements.
• What does the Traxxas iD system actually do? — The exclusive iD technology embeds a microchip into the battery connector that communicates with compatible Traxxas chargers and balancers, automatically detecting battery capacity, cell count, and charge state, then configuring the optimal charging profile automatically. This eliminates manual parameter entry, prevents incompatible charging attempts, and protects your battery through intelligent management, making the entire RC experience simpler and safer.
• Can I use this battery in non-Traxxas RC vehicles? — Technically, this is a standard 8.4V NiMH pack that could physically fit many other RC vehicles with similarly-sized battery compartments. However, the proprietary Traxxas iD connector is specific to Traxxas vehicles and chargers, so you would require an adapter or alternative connector to use this battery in non-Traxxas models. For maximum compatibility and optimal performance, use this battery exclusively with compatible Traxxas vehicles.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the Traxxas NiMH 8.4V 3300mAh 7-Cell Power Cell Battery, Flat TRX2940X today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.