Radient LiPo 3S 4000mAh 11.1V 50C Deans (HCT) RDNB40003S50H

Overview

The Radient LiPo 3S 4000mAh 11.1V 50C Deans (HCT) RDNB40003S50H is a high-performance lithium polymer battery pack designed for RC enthusiasts who demand reliable power delivery and consistent performance. Whether you're running a brushless RC car, truck, or buggy, this 3-cell LiPo battery provides the voltage and discharge capability needed to unleash maximum performance from your model. This is an ideal choice for RC car UK hobbyists looking to upgrade their power system or replace an ageing battery with proven Radient quality.

At 4000mAh capacity with a robust 50C discharge rating, this LiPo pack delivers sustained high currents essential for competitive racing, bashing, and recreational flying of compatible RC aircraft. The compact form factor measuring just 135mm × 44mm × 27mm makes it an excellent fit for a wide range of RC models where space is at a premium. Whether you're piloting a ready to run RC vehicle or building a custom setup, this battery offers the performance credentials you need.

Supplied with a Deans (HCT) connector, the RDNB40003S50H integrates seamlessly with most modern RC equipment and ESC systems. The soft case protection ensures your battery remains safe during transport and storage, whilst the age recommendation of 14+ ensures this product is handled responsibly. RC Model Shop stocks this Radient battery in the UK, ready to ship to your door with free delivery on orders over £100.

Key Features

• 3S LiPo Configuration (11.1V nominal) — Three cells in series provide the 11.1V nominal voltage that most modern brushless RC systems are designed to operate at, ensuring optimal performance and compatibility with virtually all contemporary RC car UK setups and brushless RC motors without any special regulators or modifications.
• 4000mAh Capacity — This mid-range capacity strikes the perfect balance between runtime and weight, delivering approximately 30-45 minutes of continuous use depending on your driving style and motor configuration, making it ideal for both recreational bashing and competitive racing applications.
• 50C Discharge Rate — The 50C rating means this battery can safely deliver 200 amps of continuous current (4000mAh × 50C = 200A), providing the power headroom needed for high-performance brushless RC systems and allowing you to run demanding motor and ESC combinations without throttling performance.
• Deans (HCT) Connector — The industry-standard Deans connector ensures compatibility with most modern RC equipment, ESC controllers, and chargers, eliminating the need for adapter plugs and providing secure, low-resistance connections that minimise voltage drop during operation.
• Compact Form Factor — At just 135mm long, 44mm wide, and 27mm tall, this battery fits into tight battery trays and compartments on compact RC models, making it an excellent choice for vehicles where space is limited but performance cannot be compromised.
• Soft Case Protection — The protective soft case guards against physical damage, punctures, and short circuits during transport, storage, and field use, extending the service life of your battery investment and ensuring safety during handling.
• Lightweight Design — Weighing only 340 grams (0.34kg), this LiPo pack keeps your RC vehicle's weight down, improving acceleration, top speed, and handling characteristics compared to heavier battery options.

Technical Performance

The Radient RDNB40003S50H represents a well-engineered balance between performance, capacity, and practicality for the discerning RC enthusiast. With its 50C continuous discharge rating, this 3S LiPo battery is engineered to handle the demanding requirements of modern brushless RC systems, delivering stable voltage under heavy load whilst maintaining excellent cell balance throughout the discharge cycle. The 4000mAh capacity provides sufficient energy storage for extended runtime whilst maintaining a weight profile that won't bog down acceleration or handling. The 11.1V nominal output (full charge voltage approximately 12.6V) is the industry standard for 3-cell LiPo systems, meaning this battery integrates with virtually all modern brushless RC motors, ESC controllers, and speed controllers manufactured in recent years. The construction quality typical of Radient products ensures consistent performance across multiple charge cycles, with proper care and maintenance. When paired with an appropriate charger capable of balancing cells and monitoring charge temperature, this LiPo pack will deliver years of reliable service. The Deans (HCT) connector features superior electrical conductivity compared to older connector standards, reducing resistive losses and ensuring maximum voltage delivery to your motor. Whether you're running a high-speed 4WD RC buggy, tackling off-road terrain in a brushless RC truck, or enjoying weekend bashing sessions, this battery's performance envelope accommodates a diverse range of RC applications and driving styles.

What's in the Box

• Radient LiPo 3S 4000mAh 11.1V 50C battery pack
• Soft protective case for storage and transport
• Deans (HCT) connector pre-installed

Frequently Asked Questions

• Is the Radient 3S 4000mAh 50C LiPo suitable for beginners? — Yes, this battery is an excellent choice for newcomers to RC hobbying. The 11.1V nominal voltage is the industry standard, meaning it works with most modern brushless RC systems. However, beginners should ensure they have a proper LiPo charger (not included) capable of balancing cells, and should familiarise themselves with safe LiPo battery handling practices before operation. The age recommendation of 14+ reflects the need for responsible handling and adult supervision if younger users are involved.
• What do I need to charge this battery? — You will need a dedicated LiPo battery charger capable of charging 3-cell (3S) packs and ideally with balancing functionality to maintain cell health. Standard chargers designed for NiMH batteries will not work with LiPo packs. RC Model Shop stocks a range of compatible chargers if you don't already have one.
• How long will this battery last per charge? — Runtime depends on your specific RC model, motor type, driving style, and terrain. Typically, users can expect 30-45 minutes of continuous operation before the battery reaches its safe discharge limit. High-performance driving with constant throttle will result in shorter runtime, whilst gentler driving extends usable time.
• What RC models is this battery compatible with? — The RDNB40003S50H suits any RC model featuring a 3S LiPo battery compartment and Deans (HCT) connector. This includes brushless RC cars, trucks, and buggies across multiple scales (1/10, 1/8, and smaller scales). Check your vehicle's specifications or battery compartment to confirm 3S compatibility and connector type before purchasing.
• How does the 50C rating affect performance? — The 50C discharge rate ensures this battery can safely supply high currents without voltage sag or damage. This rating means the battery can deliver 200 amps continuously (4000mAh × 50 = 200A), providing headroom for even demanding brushless motors and ESC combinations. Higher C-ratings typically offer better performance under load, more stable voltage delivery, and longer service life.
• What is the difference between this and lower C-rated LiPo batteries? — Lower C-rated batteries (such as 25C or 35C) have reduced current delivery capability, meaning they'll experience greater voltage sag under load and may throttle performance on high-power RC systems. The 50C rating provides superior performance headroom and is better suited to high-performance applications. Lower C-rated packs are generally heavier and less responsive.
• Does this battery come pre-charged? — LiPo batteries are typically shipped in a partial charge state for safety reasons. You should charge the battery fully before first use following the instructions provided with your LiPo charger.
• Can I use this battery with my old RC model? — Only if your RC model's ESC and motor are rated for 3S LiPo (11.1V) operation. Older RC models designed for NiMH batteries operate at lower voltages and will be damaged by 11.1V LiPo packs. Always verify your vehicle's battery compatibility before purchasing.

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 Radient LiPo 3S 4000mAh 11.1V 50C Deans (HCT) RDNB40003S50H 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.