Overlander Sport 11.1V 5000mAh 35C LiPo Pack EC5 – 2577

Overview

The Overlander Sport 11.1V 5000mAh 35C LiPo Pack EC5 – 2577 is a premium lithium polymer battery engineered to deliver exceptional performance across the full spectrum of RC hobbies. Whether you're piloting large sport planes, flying scale aircraft, operating high-performance drones, or racing RC cars at speed, this 3S LiPo battery provides the consistent power, extended runtime and responsive burst capability that serious RC enthusiasts demand. Recognised for offering excellent performance at an affordable price, Overlander's Sport range is trusted by both beginners discovering the world of RC for the first time and seasoned competitors who have specific power requirements. This 5000mAh capacity battery represents the perfect balance between energy storage and practical weight distribution, ensuring your RC model remains agile, responsive and efficient whilst benefitting from substantially extended flight or driving times.

The Overlander Sport 2577 is built with precision engineering and premium materials to withstand the demands of high-performance RC applications. Every battery undergoes rigorous testing to ensure consistent output, whilst advanced ultrasonic welding strengthens internal connections to handle the stresses of intense use. The pack features high-quality, multi-strand silicone leads and gold-plated connectors that ensure maximum power transfer with minimal resistance losses. These components combine to create a battery that doesn't just meet expectations—it exceeds them, delivering reliable power whether you're executing precise aerobatic manoeuvres in the air or high-speed sprints on a race track.

With robust construction, safe chemistry, and a well-balanced combination of capacity and discharge rate, the Overlander Sport 11.1V 5000mAh 35C LiPo Pack is a trusted choice for RC car UK enthusiasts, drone pilots, aircraft flyers and hobbyists seeking dependable performance. The EC5 connector ensures secure connections that can safely handle high current loads without overheating, whilst the flexible connectivity options allow this battery to work with nearly any ready to run RC model you own.

Key Features

• 5000mAh Capacity for Extended Runtime — The 5000mAh energy storage capacity ensures long run times, which is essential whether you're flying RC aircraft, operating drones, or driving RC cars on the track. Instead of cutting your session short for frequent recharges, you can enjoy substantially extended performance with each charge. The balance between capacity and weight means your model remains efficient and responsive whilst still benefitting from a large energy reserve that keeps you in the action longer.
• 11.1V Power with 3S Cell Configuration — The 11.1V nominal voltage (3S LiPo) provides steady energy perfect for larger RC models, ensuring compatibility with a wide range of electric motors and speed controllers. This voltage level delivers robust performance without overwhelming electronics, making it suitable for high-performance applications from scale aircraft to medium-to-large helicopters and advanced drones.
• 35C Constant Discharge Rate with 65C Burst Capability — The 35C constant discharge rating means this battery safely supplies high bursts of current to demanding motors and electronic speed controllers, delivering maximum current of 175A continuously. The 65C burst capability (325A maximum burst current) provides extra surge power for those critical moments when you need rapid acceleration or sharp manoeuvres, whether executing tight aerobatic turns in an aircraft or launching into high-speed sprints on a race track. This combination ensures your model performs consistently under sustained demand whilst having the power reserves for brief, intense performance demands.
• EC5 Connector with Low-Resistance Design — The EC5 connector design ensures a secure, low-resistance connection that can handle high current loads without overheating or voltage loss. This connector type is favoured across the RC industry for its durability, ease of use, and proven safety record. The gold-plated contact surfaces maintain optimal conductivity, ensuring maximum power transfer to your model with minimal resistance losses.
• Flexible Connectivity Options — In addition to the EC5 connector, this battery comes with bare leads and is available with a variety of pre-fitted connectors including Deans, EC3, XT60, XT90, XT90S (Anti-Spark) and Traxxas connectors. This flexibility means the Overlander Sport 2577 can adapt to virtually any RC model in your collection, whether you're running a fleet of different vehicles or switching between various setups.
• Compact and Lightweight Design — Measuring just 138 x 42 x 27mm and weighing 343g, this battery offers high power output in a streamlined design that fits seamlessly into various RC models without adding unnecessary bulk. The lightweight construction keeps your aircraft agile, your drone responsive, and your car nimble, whilst the compact footprint means integration into most setups is straightforward and doesn't significantly affect weight distribution.
• Premium Construction with Fullymax Cells — Built using premium Fullymax cells, each pack is carefully matched for internal resistance, voltage output and weight, ensuring stable, high-performance power delivery. Advanced ultrasonic welding strengthens all internal connections to withstand the demands of high-performance models, whilst added padding protects against impacts and vibration without adding extra bulk.
• No Memory Effect and Low Self-Discharge — Unlike older nickel-based batteries, this LiPo battery has no memory effect, meaning you can recharge it at any point in its cycle without losing capacity. The cells feature low self-discharge characteristics, resulting in more useable charge cycles and less downtime between sessions, allowing you to spend more time enjoying your RC hobby.
• JST-XH Balance Connector — The integrated JST-XH balance connector is specifically designed for use with LiPo balance chargers, allowing each cell to be monitored and charged individually. This ensures your battery remains perfectly balanced, which is critical for consistent performance, safe charging, and maximising the lifespan of your pack.

Technical Performance

The Overlander Sport 11.1V 5000mAh 35C LiPo Pack represents a sophisticated engineering achievement, combining premium materials with precision manufacturing to deliver uncompromising performance. The 55.5 watt-hour capacity provides substantial energy reserves whilst remaining practical in terms of weight and dimensions—critical factors for any RC application where mass affects performance. The 35C constant discharge capability translates to a maximum continuous current delivery of 175 amps, whilst the 65C burst rating provides 325 amps for short periods when rapid acceleration or sharp manoeuvres demand additional power. The 10AWG (6mm) wire gauge ensures minimal voltage sag during high-demand operations, maintaining consistent power delivery throughout your flying or driving sessions. Every cell in this battery is carefully matched for internal resistance to ensure even power distribution, stable voltage output and predictable performance. The multi-strand silicone leads are engineered for flexibility and durability, resisting the vibrations and stresses inherent in RC models, whilst gold-plated connectors prevent corrosion and maintain optimal electrical contact. For aircraft applications, this battery excels in large sport planes and scale models where extended flight times and sustained power delivery are essential. In the quadcopter and drone market, the 5000mAh capacity extends flight times substantially compared to smaller capacity batteries, making it ideal for photography missions, FPV flying and extended recreational operations. For RC car enthusiasts, whether racing on the track or bashing off-road, the combination of capacity and discharge rate delivers both the endurance for longer runs and the responsive throttle control that separates competitive systems from casual equipment. The battery's consistent voltage output throughout most of its discharge cycle ensures your model maintains predictable handling and performance until the battery is nearly depleted.

What's in the Box

• Overlander Sport 11.1V 5000mAh 35C LiPo Pack with EC5 connector
• JST-XH balance connector for balance charging
• Multi-strand silicone leads with gold-plated connections

What You Need to Complete

• Compatible LiPo balance charger (AC or DC, capable of handling 3S packs)
• LiPo safety charging sack for safe charging and storage
• RC model compatible with 11.1V (3S) LiPo batteries and high-current discharge capability

Frequently Asked Questions

• Is the Overlander Sport 11.1V 5000mAh 35C LiPo Pack suitable for beginners? — Yes, this battery is excellent for both beginners and experienced RC enthusiasts. Overlander's Sport range is recognised for offering exceptional performance at an affordable price point, making it accessible to newcomers whilst delivering the power that seasoned pilots and drivers appreciate. However, beginners should ensure they have access to a proper LiPo balance charger and understand safe charging practices before using this battery. The 5000mAh capacity is forgiving in terms of runtime, giving you plenty of flight or drive time to develop your skills without frustration from constant recharging.
• What type of charger do I need for this battery? — You'll need a dedicated LiPo balance charger capable of handling 3S (11.1V) lithium polymer batteries. The charger should have a balance port compatible with the JST-XH connector to allow individual cell monitoring during charging. Popular options include the Overlander RC-S65 AC 65W Balance Charger, which offers multiple charging modes including balance, fast, storage and discharge functions. Never use a standard NiMH or NiCd charger, as this can cause overcharging, uneven cell voltages or dangerous thermal events. Always follow the manufacturer's guidelines for safe charging practices.
• How long will this battery power my RC model? — Runtime depends on your specific model and how you operate it. The 5000mAh capacity provides extended flight or drive times compared to smaller capacity batteries. Generally, you can expect 15-25 minutes of flight time in a typical drone or aircraft, or 20-30 minutes of moderate driving in an RC car, though high-performance flying or racing with full throttle will reduce these times. The 35C discharge rating ensures your model receives consistent power throughout the discharge cycle, maintaining responsive performance until the battery is nearly depleted.
• Can I use this battery with different RC models? — The flexibility of this battery is one of its key advantages. It comes with an EC5 connector and is available with additional connector options including Deans, EC3, XT60, XT90, XT90S (Anti-Spark) and Traxxas connectors. You can also use bare leads for custom installations. However, you must verify that each RC model can safely handle 11.1V (3S) input and is capable of drawing the current your application demands. Always check your model's specifications and motor/ESC ratings before connecting this battery.
• What is the difference between the 35C constant rating and the 65C burst rating? — The 35C constant discharge rating tells you this battery can safely supply high current continuously without damage—up to 175 amps in this case. The 65C burst rating (325 amps maximum) is the bonus power boost that kicks in for short periods when you really need extra juice, lasting just a few seconds during intense manoeuvres like tight aerial turns, sudden climbs or all-out acceleration sprints. For high-performance RC models like racing drones, aerobatic planes or competitive RC cars, both ratings are essential; the constant rating ensures sustainable performance whilst the burst rating delivers the snappy response that makes the difference in competitive scenarios.
• How should I store this battery when not in use? — Store your Overlander battery at approximately 50% charge (around 3.7V to 3.85V per cell) in a cool, dry location away from heat sources and direct sunlight. Never store a fully charged battery or one that's been allowed to completely drain. Avoid leaving batteries in hot vehicles, near windows or other warm environments. A fireproof LiPo safety sack provides additional protection during storage and transport. Before long-term storage, use your charger's storage mode to bring the battery to the optimal 50% charge state. Check the battery periodically and recharge to storage voltage if the voltage drops significantly.
• What makes this better than other 11.1V LiPo batteries? — The Overlander Sport 2577 combines several advantages: premium Fullymax cells carefully matched for resistance and voltage consistency, advanced ultrasonic welding for durability, multi-strand silicone leads that resist vibration damage, gold-plated connectors that maintain optimal conductivity, and rigorous testing to ensure every battery performs consistently. The Sport range is specifically engineered for larger RC models, making it ideal for scale aircraft, sport planes, medium-to-large helicopters and advanced drones. The build quality, with added padding for impact protection and precise cell matching, ensures reliable performance and extended cycle life compared to budget alternatives.
• Is this battery safe to use? — Yes, when used correctly with proper equipment and procedures. LiPo batteries are safe when handled with care: always use a compatible balance charger set to LiPo mode, never leave batteries unattended during charging, store in a cool place away from flammable materials, never overcharge or over-discharge, inspect regularly for damage or swelling, and secure the battery properly in your model to prevent movement during operation. A LiPo safety charging sack is recommended for additional fire containment in the unlikely event of a thermal issue. Always follow manufacturer guidelines and never use incompatible charging equipment.

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 Sport 11.1V 5000mAh 35C LiPo Pack EC5 – 2577 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.