Overview
The Spektrum 7.4V 4000mAh 2S 30C Smart G2 Hardcase LiPo Battery with IC5 connector is a premium lithium polymer battery pack designed for RC enthusiasts across the UK who demand reliable, intelligent power for their surface vehicles and RC cars. This Smart-enabled battery represents the pinnacle of battery technology, combining robust hardcase protection with sophisticated data management capabilities that make charging, monitoring and maintaining your RC vehicle simpler than ever before. Whether you're a seasoned basher looking for a high-performance 2S LiPo for your brushless RC car or a weekend racer seeking dependable power with built-in safety features, this Spektrum battery delivers exceptional performance paired with unparalleled convenience.
Built with Spektrum's advanced G2 Smart technology, this battery automatically communicates with compatible Smart chargers, uploading its unique charging parameters and health information instantly. The 4000mAh capacity provides extended runtime for your RC adventures, whilst the 30C continuous discharge rating offers a perfect balance between performance and longevity, making this an ideal choice for competitive racers and recreational drivers alike. The hardcase construction protects your investment during transport and storage, whilst the IC5 connector ensures secure, reliable power delivery to your RC vehicle's electronics.
RC Model Shop is proud to stock this genuine Spektrum Smart battery, a trusted choice for anyone serious about their RC hobby in the UK. The combination of intelligent battery management, ample capacity and proven Spektrum reliability makes this 2S LiPo pack a must-have for drivers operating 2S-compatible brushless RC cars, particularly those who already own Spektrum Smart charging systems.
Key Features
- Smart G2 Technology — This battery features Spektrum's second-generation Smart technology, which automatically uploads the battery's unique charging parameters and health information to any compatible Spektrum Smart charger the moment you connect it, eliminating manual configuration and ensuring perfectly optimised charging every single time.
- 4000mAh Capacity — The 4000mAh energy storage capacity provides extended runtime compared to smaller capacity batteries, allowing you to spend more time driving and enjoying your RC vehicle before needing to recharge, particularly beneficial for surface vehicles and 1/10 scale RC cars.
- 30C Continuous Discharge Rating — The 30C rating means this battery can safely deliver up to 120 amps of continuous current (4000mAh × 30C = 120A), providing reliable power for brushless motors whilst maintaining excellent longevity and cycle life, making it suitable for both racing and bashing applications.
- Hardcase Protection — Unlike soft-case batteries, this pack features a protective hardcase shell that shields the cells from physical damage, impact and compression during transport, storage and use, significantly extending the battery's lifespan and ensuring safety during your RC sessions.
- IC5 Connector — The IC5 connector is a high-quality, secure connection standard used across many brushless RC vehicles, providing excellent electrical contact and safe, reliable power transfer without risk of accidental disconnection during operation.
- Integrated Memory Microchip — This battery contains a built-in microchip that stores vital data including battery brand, type, capacity, C rating, individual cell voltages, temperature readings and comprehensive charge/discharge cycle history, accessible through any compatible Smart charger for complete battery management and diagnostics.
- Error Logging and Diagnostics — The battery automatically maintains an error log recording any overheating, over-discharging or overcharging incidents, providing you with critical information to ensure you're using the correct battery for your application and identifying potential issues before they become problems.
- Auto Charge Functionality — When connected to a Spektrum Smart charger, the Auto Charge feature recognises the battery's parameters and begins safe, accurate charging automatically without requiring any manual settings adjustment, making the charging process faster and more foolproof.
- Customisable Charge Rate — The Smart technology allows you to customise the charge rate of this battery through your Spektrum Smart charger, giving you full control to take advantage of this pack's fast-charging capabilities when you're in a hurry or to use slower rates when optimal for battery health.
- 2S LiPo Configuration — With two cells providing 7.4V nominal voltage, this battery is specifically designed for 2S-compatible vehicles, offering the right voltage and capacity for 1/10 scale brushless RC cars, making it an excellent choice for popular ready-to-run and race-spec vehicles in this category.
Technical Performance
The Spektrum 7.4V 4000mAh 2S 30C Smart G2 Hardcase LiPo Battery represents excellent engineering in modern RC battery design. The 2S (two-cell) configuration delivers 7.4V nominal voltage with a maximum voltage of 8.4V when fully charged, making it compatible with a wide range of brushless RC cars and surface vehicles available in the UK market, particularly 1/10 scale crawlers, buggies and short-course trucks. The 4000mAh capacity strikes an ideal balance, offering substantial runtime for extended driving sessions without excessive weight that would negatively impact vehicle performance. The 30C discharge rate of 120 amps continuous current provides smooth, reliable power delivery to brushless motor systems rated for 2S operation, ensuring your RC vehicle performs consistently without voltage sag during demanding driving conditions.
Construction quality is evident throughout this battery pack. The hardcase shell is engineered to withstand the rigours of RC use, protecting the individual LiPo cells from puncture, compression and impact damage that could otherwise lead to catastrophic failure. The IC5 connector is a gold-plated, high-current connector capable of handling the full 120-amp discharge capability without resistance or heat buildup, ensuring maximum power reaches your vehicle's electronics. The integrated Smart memory microchip, whilst invisible to the user, represents a significant technological advancement, functioning as a sophisticated battery management system that communicates bidirectionally with compatible chargers. This real-time data exchange allows Spektrum Smart chargers to optimise every charging cycle based on the battery's actual condition, previous usage history and current health status, resulting in charging routines that maximise cycle life and performance. For UK drivers and racers who already own Spektrum Smart charging equipment, this battery integrates seamlessly into a complete intelligent power management ecosystem.
What's in the Box
- Spektrum 7.4V 4000mAh 2S 30C Smart G2 Hardcase LiPo Battery
- IC5 connector pre-installed
Frequently Asked Questions
- Which RC vehicles is this 2S LiPo battery compatible with? — This 7.4V battery is designed for 2S-compatible RC vehicles, particularly 1/10 scale brushless RC cars including buggies, short-course trucks and crawlers. Many popular ready-to-run RC models and race-spec vehicles in the UK are built around 2S power systems. However, you should always verify your vehicle's battery requirements before purchasing. The IC5 connector means this battery is compatible with any RC vehicle using an IC5 charging port and designed for 2S operation.
- Do I need a Spektrum Smart charger to use this battery? — Whilst this battery features Smart technology that provides automatic parameter recognition with Spektrum Smart chargers, it can also be charged with any quality LiPo charger that supports 2S packs and features an IC5 connector. However, to fully utilise the battery's Smart features including Auto Charge, health monitoring and diagnostic error logging, a Spektrum Smart charger is highly recommended.
- What is the difference between the 30C rating and higher-capacity 50C or 100C batteries? — The 'C' rating indicates the maximum safe continuous discharge rate. A 30C battery can discharge at 30 times its capacity per hour (4000mAh × 30C = 120 amps), which is perfectly adequate for most standard brushless RC vehicles. Higher-rated batteries like 50C or 100C allow greater discharge rates, suitable for high-performance racing or extreme bashing, but the 30C rating balances performance with cycle life and cost-effectiveness for recreational and competitive use.
- How long will this battery last in my RC car? — Runtime depends entirely on your vehicle's motor, ESC settings and driving style. Factors including throttle application, terrain, temperature and vehicle weight all affect battery consumption. A typical 1/10 scale brushless RC car with this 4000mAh battery can expect between 15 to 25 minutes of active driving, though lighter vehicles may achieve longer runtimes.
- Is the hardcase protection really necessary? — Yes, the hardcase design is genuinely beneficial. LiPo batteries are vulnerable to physical damage, and punctured or compressed cells can become dangerously unstable. The protective hardcase shell prevents this damage during transport, storage and use, extending your battery's lifespan and ensuring safety—a worthwhile investment if you want your battery to provide reliable service over many seasons of RC driving.
- Can I use this battery with my existing charger? — This battery features an IC5 connector, so it's compatible with any quality LiPo charger that supports IC5 connections and is configured for 2S charging. However, Smart-specific features like Auto Charge recognition and diagnostic data access require a Spektrum Smart charger. If you don't currently own a Smart charger, this battery can still function perfectly with standard LiPo chargers available from RC retailers across the UK.
- What does the 4000mAh specification mean? — Milliamp-hours (mAh) measure a battery's energy capacity. A 4000mAh battery stores 4 amp-hours of energy. Higher mAh ratings mean longer runtime, though they also typically mean slightly more weight. The 4000mAh capacity offers an excellent compromise between extended driving time and reasonable weight, ideal for 1/10 scale vehicles.
- Is this battery suitable for beginners? — Absolutely. Spektrum Smart batteries are specifically designed to simplify battery management for all skill levels. Beginners benefit tremendously from the Auto Charge feature, which eliminates the complexity of manual charger configuration. The integrated error logging also helps new users understand proper battery care and usage, making this an excellent educational tool as you learn about RC vehicle maintenance and battery management.
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 SPM 7.4V 4000mAh 2S 30C Smart G2 Hardcase LiPo Battery: IC5 O-SPMX-1087 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.
