Traxxas LiPo 3S 4000mAh 11.1V 25C iD Power Cell Battery TRX2849X

Overview

The Traxxas LiPo 3S 4000mAh 11.1V 25C iD Power Cell Battery TRX2849X represents premium power for your RC car UK collection. This is Traxxas Certified LiPo technology engineered to deliver the punch and on-demand power your ready to run RC vehicles need to reach their full performance potential. Whether you're running a brushless RC short course truck, a high-speed basher, or a competitive racing platform, this 3-cell LiPo battery provides the speed and runtime that separates casual driving from serious performance. Built specifically to fit Traxxas models and maximise their full capability, the Power Cell battery takes the guesswork out of going fast.

This battery is ideal for RC enthusiasts who want more of what matters most: simple installation, excellent value, and the most speed and runtime available. The Traxxas iD connector system ensures safe, foolproof battery management and compatibility across compatible Traxxas chargers and vehicles. With a 4000mAh capacity and robust 25C continuous discharge rating, this stick-format battery delivers consistent power delivery for extended run times, making it perfect for weekend bashers, racers, and anyone serious about getting the absolute best performance from their Traxxas RC car or truck.

The LiPo 3S 4000mAh battery is compatible with a wide range of Traxxas models including the Slash Ultimate 4x4 VXL, Slash VXL 4x4, Slash 2WD VXL-3S, Slash Extreme HD VXL, and TRX-4 Defender, making it a versatile power solution for your RC hobby UK setup.

Key Features

• Traxxas Certified LiPo Technology — This battery is engineered and certified by Traxxas specifically for their RC vehicles, meaning it has been tested and validated to work safely and optimally with compatible Traxxas models, giving you confidence in reliability and performance.
• 3-Cell (3S) Configuration at 11.1V — The three-cell lithium polymer configuration delivers 11.1 volts of nominal power, providing the voltage required for high-performance brushless systems and maximising your model's speed and acceleration capabilities without compromising battery safety.
• 4000mAh Capacity for Extended Runtime — With 4000 milliamps of capacity, this battery offers substantial runtime for extended play sessions, letting you enjoy longer driving periods before needing to recharge, which is essential for competitive racing or recreational bashing.
• 25C Continuous Discharge Rating — The 25C rating means this battery can safely deliver 100 amps of continuous current (25 × 4Ah = 100A), providing sufficient power headroom for brushless motors and ensuring the battery won't become a performance bottleneck in your setup.
• Traxxas iD Connector System — The intelligent iD connector automatically communicates battery information to compatible Traxxas chargers, preventing overcharging, over-discharging, and other hazards whilst optimising charge cycles for maximum battery lifespan.
• Stick Format Design — The compact stick-format shape (135mm length × 43mm width × 26mm height) is engineered to fit precisely into Traxxas models with dedicated battery compartments, ensuring secure mounting and optimal weight distribution.
• Lightweight at 11.1oz — Despite its substantial 4000mAh capacity, this battery weighs only 11.1 ounces, keeping your RC vehicle's weight balanced for improved handling characteristics and responsiveness.
• Simple Installation and Compatibility — Traxxas Power Cell batteries are designed for effortless installation into compatible models without modification, making them ideal whether you're upgrading your power system or replacing a spent battery.

Technical Performance

The Traxxas LiPo 3S 4000mAh 11.1V 25C battery represents modern lithium polymer engineering optimised for high-performance RC applications. The 25C continuous discharge rating ensures that brushless RC short course trucks, stadium trucks, and other Traxxas vehicles with high-power demand can draw the current they need without voltage sag, maintaining consistent power delivery throughout your run. At 11.1 volts nominal (3S configuration), this battery sits in the sweet spot for Traxxas brushless systems, delivering rapid acceleration and top-end speed whilst maintaining safe operating parameters. The 4000mAh capacity has been carefully selected to balance weight, power delivery, and runtime; sufficient for competitive racing sessions or extended recreational bashing without becoming excessively heavy. The stick format construction uses quality lithium polymer cell technology with internal protection circuits, and the Traxxas iD connector system provides intelligent battery management that prevents damage from over-charging or over-discharging. Each cell in the 3S pack is matched for consistent performance, ensuring even power distribution and predictable handling characteristics. This battery is engineered to work specifically with Traxxas models including the Slash Ultimate 4x4 VXL, Slash VXL series, Slash Extreme HD, and TRX-4 Defender variants, though the iD connector makes it incompatible with older non-iD Traxxas systems. The 25C rating provides substantial current capacity even at the 4Ah charge level, meaning sustained high-power demands won't cause thermal stress or premature battery degradation.

What's in the Box

• Traxxas LiPo 3S 4000mAh 11.1V 25C iD Power Cell Battery (TRX2849X)
• Traxxas iD connector pre-installed

Frequently Asked Questions

• Is the Traxxas 3S 4000mAh battery suitable for beginner RC drivers? — Yes, this battery is excellent for beginners because the Traxxas iD connector system removes the guesswork from battery management. The intelligent connector communicates with compatible Traxxas chargers to prevent overcharging and damage, making it safer and more user-friendly than older battery technologies. Beginners appreciate the simple plug-and-play installation and the extended runtime that allows longer practice sessions.
• Which Traxxas models are compatible with the TRX2849X battery? — This battery is compatible with multiple Traxxas RC models including the Slash Ultimate 4x4 VXL, Slash VXL 4x4, Slash 2WD VXL-3S, Slash Extreme HD VXL, and TRX-4 Defender in various colours. Compatibility requires either a 3S LiPo capable model or a VXL-3S brushless system. Always verify your specific model number before purchasing.
• What voltage is this battery and why does it matter? — This is an 11.1V 3S (three-cell) LiPo battery, meaning it provides 3.7 volts per cell for a total of 11.1 volts nominal. Voltage is critical because your vehicle's electronic speed control (ESC) is programmed for a specific voltage range. A 3S battery is designed for 3S-capable Traxxas models and should not be used with 2S or 4S systems, as this could damage electronics or reduce performance.
• What does the 25C rating mean and why is it important? — The 25C rating is the continuous discharge rate multiplier. With a 4000mAh (4Ah) capacity, a 25C rating means this battery can safely deliver 100 amps continuously (4 × 25 = 100A). This is important because high-powered brushless motors demand substantial current. A 25C rating provides sufficient headroom for performance driving without voltage sag, thermal stress, or premature cell degradation.
• How long will this battery last before needing replacement? — With proper care, a quality LiPo battery typically lasts 100-300 charge cycles depending on charging practices and usage. Store the battery at 50% charge when not in use for extended periods, avoid fully discharging below 3.0V per cell, and charge with a quality Traxxas iD compatible charger. The Traxxas iD system helps protect your battery from damage by preventing over-charging and over-discharging.
• Do I need a special charger for this battery? — The Traxxas iD connector requires a Traxxas iD-compatible charger for optimal safety and battery management. Traxxas offers several iD charger options that automatically recognise the battery and apply the correct charge rate and algorithm. Using a non-iD charger with an adapter defeats the purpose of the intelligent battery management system.
• What is the difference between a 3S and 2S or 4S LiPo battery? — The number refers to cell count. A 2S battery has two cells (7.4V nominal), a 3S has three cells (11.1V nominal), and a 4S has four cells (14.8V nominal). Higher cell count means higher voltage and typically more power, but your vehicle must be designed for the correct voltage. Using the wrong voltage can damage your ESC or motor. This 3S battery is specifically for 3S-capable Traxxas models.

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 LiPo 3S 4000mAh 11.1V 25C iD Power Cell Battery TRX2849X 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.