RDNB27003S30EC3

Overview

The Radient LiPo 3S 2700mAh 11.1V 30C EC3 battery pack (RDNB27003S30EC3) is a compact and practical lithium polymer power solution designed for RC enthusiasts across the UK who demand reliable performance in a space-conscious package. Whether you're piloting an RC car, RC truck, or other electric RC vehicle that specifies 3S LiPo power, this battery delivers the voltage and capacity needed for extended running times without compromising on portability. The 2700mAh capacity strikes an excellent balance between runtime and weight, making it an ideal choice for hobbyists who want consistent performance without the bulk of larger capacity packs.

This EC3-equipped battery is built to integrate seamlessly into any RC setup that features an EC3 connector, one of the most widely recognised standards in the RC hobby across the UK and beyond. The slim 18mm profile and compact 135 × 42mm footprint mean this pack will fit into tight battery compartments where space is at a premium, giving you the flexibility to use it across multiple RC platforms. At just 0.23kg in shipping weight, it's light enough for your RC buggy, truck, or basher without adding unnecessary mass that would impact performance and handling characteristics.

Designed with quality and reliability at its core, the Radient LiPo 3S 2700mAh 11.1V 30C EC3 represents excellent value in the competitive UK RC battery market. Whether you're new to the RC hobby or an experienced enthusiast running multiple vehicles, this battery offers the dependability and versatility you need to keep your RC adventures going strong.

Key Features

• 3S Configuration (11.1V nominal) — This three-cell lithium polymer setup delivers 11.1V nominal voltage, which is the industry-standard specification for 3S LiPo systems across RC car UK applications. This voltage is perfectly suited to brushless motors rated for 3S power and ensures optimal ESC and servo operation without over-stressing or under-powering your components.
• 2700mAh Capacity — The 2700mAh capacity provides a practical balance between runtime and weight, offering enough juice for extended driving sessions without making your RC vehicle unnecessarily heavy. This capacity is ideal for 1/10-scale RC cars, smaller RC trucks, and other compact RC platforms where weight distribution matters for handling and performance.
• 30C Discharge Rating — The 30C continuous discharge rate means this battery can safely deliver up to 81 amperes of current (30 × 2.7Ah = 81A), making it suitable for electric RC vehicles with moderate to high power demands. This rating ensures you can run brushless motors and demanding drive systems without voltage sag or battery stress, maintaining consistent throttle response throughout your session.
• EC3 Connector — The EC3 plug is one of the most widely adopted battery connectors in the RC hobby, particularly across the UK market. This connector provides a secure, reliable connection with low resistance, ensuring efficient power delivery to your RC vehicle's ESC and motor. If your RC car or truck already features an EC3 connector, this battery will integrate immediately without any adapter requirements.
• Compact Dimensions (135 × 42 × 18mm) — The slim 18mm profile and measured 135mm length and 42mm width make this pack exceptionally space-efficient. These dimensions allow fitment into battery bays designed for tight clearances, a crucial advantage if you're running multiple RC vehicles with varying battery compartment sizes or if you've upgraded your chassis with components that reduce available battery space.
• Soft Case Protection — The battery comes housed in a protective soft case that shields the cells from impacts, abrasions, and environmental contaminants during storage and transport. This case protection extends battery lifespan and helps maintain the integrity of the balance lead connector and solder joints, reducing the risk of performance degradation over time.
• Recommended for Ages 14+ — This battery is recommended for users aged 14 and above, reflecting the importance of proper handling, charging protocols, and safety procedures when working with lithium polymer cells. This age recommendation ensures that users have the maturity to understand LiPo safety requirements, including proper storage, charging with compatible chargers, and safe handling practices.

Technical Performance

The Radient LiPo 3S 2700mAh 11.1V 30C EC3 battery is engineered to deliver consistent, reliable power to your electric RC vehicle with minimal voltage sag and stable output characteristics throughout the discharge cycle. The 30C discharge rating is particularly significant, as it means this battery can handle sustained high-current draws without excessive voltage drop or thermal stress. For context, a 30C rating on a 2700mAh pack translates to approximately 81 amperes of continuous discharge capacity, making it perfectly suited to brushless motor systems common in modern RC car UK applications. The three-cell (3S) configuration producing 11.1V nominal voltage is the standard specification for countless electric RC vehicles on the market, from 1/10-scale buggy and touring car platforms through to smaller RC trucks and bashers. The build quality focuses on maintaining stable cell chemistry and reliable internal connections, ensuring you get consistent voltage output from the moment you hit the throttle until the battery needs recharging. The slim 18mm profile is a masterclass in space-efficient design, allowing this battery to fit into compartments where taller packs simply won't fit, whilst the 135 × 42mm footprint means it sits low in the battery bay for optimal weight distribution and handling characteristics in your RC vehicle. Whether you're running this pack in a competitive race setting or casual weekend bashing, the 2700mAh capacity delivers respectable runtime without adding excessive weight that would compromise acceleration, cornering speed, or overall vehicle dynamics.

What's in the Box

• Radient LiPo 3S 2700mAh 11.1V 30C battery pack
• EC3 connector pre-installed
• Protective soft case
• Balance lead connector for safe charging

Frequently Asked Questions

• What does 3S 11.1V mean and which RC vehicles use this voltage? — The designation 3S refers to three lithium polymer cells wired in series, which produces a nominal voltage of 11.1V (3.7V per cell). This voltage specification is the industry standard for countless electric RC vehicles sold across the UK, including 1/10-scale RC buggies, touring cars, monster trucks, and smaller RC bashers. If your RC car's manual or ESC specifications list 3S LiPo compatibility, this battery will work perfectly without any modifications or adapters.
• Is the Radient LiPo 3S 2700mAh 11.1V 30C EC3 suitable for beginners to the RC hobby? — Yes, this battery is an excellent entry-level option for newcomers to electric RC vehicles. The 3S voltage and 2700mAh capacity are non-intimidating for new users, and the EC3 connector is straightforward to use. However, beginners must understand that lithium polymer batteries require proper care: they need a LiPo-compatible charger with balance charging capability, they must never be stored fully charged or fully depleted for extended periods, and they require safe handling to prevent physical damage to the cells. As long as you're prepared to learn proper LiPo maintenance protocols, this battery is a great starting point.
• What charger do I need to safely charge this battery? — You will need a LiPo-compatible battery charger with balance charging capability. This charger should support 3S LiPo packs and ideally feature automatic cell balancing to maintain safe voltage levels across all three cells. The charger should connect to the balance lead on this battery pack to monitor and balance individual cell voltages during charging. Never attempt to charge LiPo batteries with standard NiMH or NiCd chargers, as this could cause dangerous battery failures or fires.
• What is the difference between 30C, 50C, and 75C discharge ratings? — The C-rating indicates the maximum safe discharge current relative to the battery's capacity. A 30C rating on this 2700mAh battery means it can safely discharge at 81 amperes (30 × 2.7 = 81A) without damage. Higher C-rating batteries (50C, 75C) can discharge more current safely, making them suitable for extremely high-power motors and demanding racing applications. However, the 30C rating on this battery is perfectly adequate for standard brushless RC vehicles and recreational driving; you only need higher C-ratings if you're running exotic high-KV brushless motors or competing at elite levels.
• How long will this battery run on a full charge? — Runtime depends on your specific RC vehicle's motor, ESC settings, driving style, and terrain. Generally, a 2700mAh battery in a moderate-power 1/10-scale RC car will provide 15-25 minutes of continuous running before voltage sag becomes noticeable. Performance-focused or high-power setups may see shorter runtimes, whilst lighter vehicles or lower power draws may exceed 25 minutes. The best approach is to invest in multiple batteries so you can rotate them during driving sessions.
• Can I use this battery in my ready-to-run RC car from a UK retailer? — This depends on your specific ready-to-run RC car model. Check your vehicle's manual or battery compartment to confirm it accepts 3S LiPo batteries with EC3 connectors. Many ready-to-run RC cars sold in the UK specify 3S LiPo compatibility, but some budget models may use 2S or require proprietary connectors. Measure the battery bay dimensions (135 × 42 × 18mm for this pack) to ensure fitment. When in doubt, consult your vehicle's documentation or contact the manufacturer.
• How should I store this battery when not in use? — LiPo batteries should be stored in a cool, dry place at a resting voltage of approximately 3.85V per cell (11.55V total for a 3S pack). Avoid storing fully charged (12.6V) or fully depleted (9.0V) for extended periods, as this stresses the cells and reduces lifespan. Many RC enthusiasts use fireproof LiPo storage bags as an extra safety precaution. If you won't be using the battery for more than a week, it's good practice to top it to storage voltage rather than leaving it at the charge state.
• Is this battery waterproof for use in waterproof RC vehicles? — Whilst the battery pack itself features a protective soft case, LiPo batteries are not inherently waterproof. Water ingress into the cells can cause shorts, battery failure, or dangerous situations. If you're running this battery in a waterproof RC vehicle, ensure the battery is housed in a waterproof battery box or compartment designed for your specific vehicle. Never submerge the battery itself in water, even if your RC car is waterproof.

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 2700mAh 11.1V 30C EC3 RDNB27003S30EC3 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.