Overlander SuperSport 11.1V 4250mAh 35C LiPo Stick Pack XT90 2475

Overview

The Overlander SuperSport 11.1V 4250mAh 35C LiPo Stick Pack XT90 2475 is a premium lithium polymer battery designed to deliver consistent, high-performance power to larger RC models. Whether you're piloting a sport plane, executing aerobatic manoeuvres with your 3D aircraft, or pushing a high-performance FPV model to its limits, this battery provides the energy and responsiveness your RC hobby demands. Built with premium Fullymax cells and engineered using the advanced stacking construction method, this Overlander battery represents genuine British-manufactured quality that RC enthusiasts across the UK have come to trust for reliability and performance.

With 4250mAh capacity and an 11.1V three-cell configuration, this stick pack battery fits seamlessly into RC models that require extended run times without excessive weight. The 35C constant discharge rate delivers steady, reliable power throughout your flight or drive, while the impressive 65C burst capability provides those critical moments of extra power when you need sharp acceleration, rapid climbs or demanding manoeuvres. This makes it an ideal choice for RC car enthusiasts in the UK looking for a battery that performs in competitive racing environments, as well as aircraft pilots who demand precision and consistency during every sortie.

The compact stick pack design measures just 139 x 42 x 24mm and weighs a mere 323 grams, making it perfect for larger RC models where weight distribution matters. The XT90 connector provides secure, high-current connections that minimise power loss and maximise efficiency. With multiple connector options available, including Deans, EC3, EC5, Traxxas, XT60, XT90 and XT90S anti-spark variants, this battery adapts to virtually any RC setup you already own.

Key Features

• 4250mAh Capacity — This generous capacity delivers extended run times for your RC models, allowing you to enjoy longer flights or driving sessions before needing to recharge, which is essential for serious RC car and aircraft enthusiasts who want maximum playtime from every battery charge.
• 11.1V Nominal Voltage (3S Configuration) — The three-cell setup provides a powerful, stable voltage platform that ensures your RC model performs consistently throughout the discharge cycle, delivering smooth acceleration and reliable power without drooping performance.
• 35C Constant Discharge Rate — This substantial discharge rate means the battery can deliver 148.75 amps of continuous current, providing steady, responsive power for extended periods during high-demand applications like aerobatic flying or competitive racing scenarios.
• 65C Burst Capability — When you need turbo power for short bursts, this battery can deliver up to 276.25 amps for eight seconds, perfect for take-offs, aggressive manoeuvres, tight corners and rapid climbs that demand instantaneous power delivery.
• Premium Fullymax Cells with Stacking Construction — Unlike cheaper Chinese imports manufactured using inferior winding methods, Overlander's stacking construction method delivers superior longevity, stronger voltage stability and more reliable performance across repeated use cycles.
• Precision-Matched Cell Resistance — Every cell in this pack is precisely matched for voltage, resistance and weight, ensuring stable, high-performance power output that maintains consistency throughout your RC sessions and extends overall battery life.
• Advanced Ultrasonic Welding — The connections between cells are strengthened using ultrasonic welding technology, allowing this battery to handle the demanding power requirements of high-performance RC models without compromised reliability.
• Multi-Strand Silicone Leads with Gold-Plated Connectors — The high-quality silicone leads and gold-plated connectors maximise power transfer efficiency whilst protecting against voltage drop, ensuring every ounce of battery power reaches your RC model's electronics.
• Impact-Resistant Padding — Built-in protective padding safeguards against impacts and damage during storage and transport, extending the battery's operational lifespan without adding unnecessary weight to your RC setup.
• JST-XH Balance Connector — The integrated balance lead allows you to charge this battery with a compatible balance charger, ensuring each of the three cells charges equally and maintains perfect voltage balance for optimal performance and safety.
• Flexible Connector Options — Available with bare leads or pre-fitted connectors including Deans, EC3, EC5, Traxxas, XT60, XT90 and XT90S anti-spark variants, giving you the flexibility to match your existing RC model setup without modification.
• No Memory Effect — Unlike older battery technologies, this lithium polymer battery has no memory effect, meaning you can top it up anytime without losing capacity, giving you more charging flexibility and longer overall battery life.
• Low Self-Discharge Rate — The advanced chemistry ensures minimal power loss during storage, so your battery remains ready for action when you need it, without the frustration of discovering a dead pack after days of inactivity.
• Stick Pack Configuration — The compact stick pack design fits seamlessly into dedicated battery compartments found on larger RC models, ensuring proper fitment without requiring modification or custom mounting solutions.
• 47.18 Watt-Hour Rating — This substantial energy capacity provides the watt-hours necessary to power larger RC models through extended sessions, delivering both runtime and performance in a single, integrated battery package.

Technical Performance

The Overlander SuperSport 11.1V 4250mAh 35C battery represents a significant step forward in RC power delivery. Built using premium Fullymax cells arranged in a three-cell series configuration, this battery delivers 11.1 volts of nominal power with exceptional consistency. The 35C constant discharge rating enables a maximum continuous current draw of 148.75 amps, whilst the 65C burst capability reaches an impressive 276.25 amps during high-demand moments. This performance envelope makes the battery suitable for large sport planes, aerobatic aircraft, medium to large helicopters and larger FPV models that require substantial power reserves. The stick pack measures 139 x 42 x 24 millimetres and weighs 323 grams, making it one of the most compact solutions available for 4250mAh capacity at 11.1V. The 10AWG silicone leads provide excellent current-carrying capacity without excessive weight penalty, whilst the gold-plated connectors ensure minimal resistance losses. The battery's 47.18 watt-hour rating demonstrates the substantial energy storage, and the JST-XH balance lead connector facilitates proper charging with balance chargers. Every battery undergoes rigorous testing before dispatch to ensure consistent output voltage and discharge characteristics. The advanced ultrasonic welding strengthens internal connections, allowing the battery to handle the high-current demands of competitive flying, racing and high-performance hobbying without reliability concerns. Whether you're flying across an open field or competing in organised RC racing events across the UK, this battery delivers the stable, responsive power that separates good sessions from exceptional ones.

What's in the Box

• Overlander SuperSport 11.1V 4250mAh 35C LiPo Battery Pack
• JST-XH Balance Connector Lead
• Choice of connector: Bare leads, Deans, EC3, EC5, Traxxas, XT60, XT90 or XT90S (Anti-Spark)

What You Need to Complete

• Compatible LiPo balance charger (we recommend the Overlander RC-S65 AC 65W Balance Charger for optimal charging performance)
• LiPo safety charge sack for safe charging and storage
• RC model compatible with 11.1V (3S) LiPo batteries and your selected connector type

Frequently Asked Questions

• Is the Overlander SuperSport 11.1V 4250mAh 35C battery suitable for RC cars? — Yes, absolutely. This battery is ideal for RC cars, trucks and buggies that are designed to accept 11.1V three-cell LiPo packs, particularly larger models like the Traxxas Slash and HPI Bullet that benefit from extended run times and responsive power delivery. Many UK RC car enthusiasts use multiple packs configured in parallel (two packs in 6S configuration) for even more dramatic performance improvements.
• What is the difference between 35C and higher C-rated batteries? — The C-rating indicates how quickly a battery can safely discharge its total capacity. A 35C battery can discharge at 35 times its capacity per hour, delivering 148.75 amps continuously. Higher C-rated batteries (like 65C or 100C) can deliver more current in very short bursts, making them better for racing drones or ultra-high-performance models. However, the 35C rating combined with the 65C burst capability makes this battery versatile enough for most larger RC applications including sport planes, aerobatic aircraft and high-performance RC cars.
• How long will this battery last between charges? — Runtime depends entirely on your RC model's current draw and weight. Larger, heavier models draw less current and achieve longer flight or drive times. A light aerobatic aircraft might achieve 12-15 minutes, whilst a larger FPV model might see 20-30 minutes of flight time. RC car runtime is similarly variable but typically ranges from 10-20 minutes depending on driving style and terrain. The substantial 4250mAh capacity ensures longer sessions than smaller capacity packs.
• Can I use this battery with my Traxxas Slash? — Yes, if your Traxxas Slash is configured to accept 11.1V (3S) LiPo batteries. Overlander offers this battery with Traxxas connector compatibility, and it's popular amongst UK Traxxas owners for its extended run times and responsive power delivery. Ensure your Traxxas model's speed controller and motor are rated for 11.1V operation before purchasing.
• Is this battery good for beginners? — This battery is more suitable for intermediate to experienced RC enthusiasts rather than absolute beginners. The substantial power output requires a quality LiPo charger and proper safety procedures including use of a charge sack. Beginners should start with smaller capacity batteries and learn proper LiPo handling before graduating to batteries of this capacity and discharge rating. Always follow Overlander's safety guidelines and never leave this battery unattended during charging.
• How should I charge this battery safely? — Always use a dedicated LiPo balance charger set to lithium polymer mode, never use a regular charger or regular battery charger settings. The JST-XH balance lead must be connected to your charger's balance port to ensure even charging across all three cells. Charge the battery in a fireproof LiPo safety charge sack, never leave it unattended during charging, and ensure the charger is set to the correct voltage (11.1V) and chemistry (LiPo). Charge at 1C rate (4.25 amps) for safe, controlled charging.
• What makes Overlander's stacking construction superior to winding construction? — Overlander uses stacking construction, where individual cell layers are stacked together, rather than the cheaper winding method used by many Chinese imports. Stacking construction delivers stronger, more reliable voltage characteristics, superior longevity across many charge cycles, and more consistent discharge rates. Winding construction, whilst cheaper to manufacture, often quotes unrealistic C-ratings and fails to deliver stable performance, particularly under sustained high-current demands.
• How do I store this battery long-term? — Store your battery at approximately 50% charge (around 3.7-3.85V per cell) in a cool, dry location away from direct sunlight, heat sources and moisture. Never store the battery fully charged or completely discharged, as both states stress the cells. A dedicated LiPo storage sack provides additional protection. Check the battery monthly and top up the charge if necessary to maintain the storage voltage window. Never allow the battery to sit completely drained, as this causes permanent damage.
• What is included with the XT90 connector version? — The XT90 connector version includes the battery pack, JST-XH balance lead connector, and the XT90 connector pre-fitted to the battery's discharge leads. The XT90 is particularly popular for high-current applications as it features anti-spark design variants available, reducing the risk of sparks during connection and disconnection. If you need a different connector, Overlander offers multiple options as selections at checkout.
• How many charge cycles will this battery endure? — With proper care and charging practices, LiPo batteries typically endure 300-500 full charge cycles before capacity begins degrading noticeably. The Overlander SuperSport's premium construction and matched cells support the upper end of this range. Avoid over-discharging, overcharging and heat exposure to maximise cycle life. Many UK RC enthusiasts report consistent performance across 150+ cycles with careful maintenance.

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 Overlander SuperSport 11.1V 4250mAh 35C LiPo Stick Pack XT90 2475 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.