Overview
The Spektrum SPM 4000mAh 3S 11.1V Smart LiPo Battery with IC3 connector is a high-performance lithium polymer battery specifically engineered for RC aircraft and high-demand RC applications. This 30C discharge-rated pack delivers exceptional power and reliability, making it an ideal choice for RC enthusiasts across the UK seeking consistent performance from their models. Whether you're flying competition aircraft, high-performance RC planes, or upgrading your current RC setup, this Smart battery integrates cutting-edge microchip technology that sets it apart from conventional batteries in the RC hobby market.
What makes this battery truly revolutionary is Spektrum's integrated Smart technology. Unlike traditional RC batteries that require manual configuration for each charge cycle, this Smart LiPo automatically uploads its unique parameters to any compatible Spektrum Smart charger. Simply press the start button and the charger handles the rest—no more adjusting charge rates, discharge preferences, or storage settings. This is the kind of convenience that appeals to serious RC car and RC aircraft enthusiasts who want to spend more time enjoying their hobby and less time managing battery settings.
The 4000mAh capacity at 11.1V (3 cells in series) provides 44.4 watt-hours of energy, delivering ample power for extended flight times and vigorous performance. The 30C continuous discharge rate ensures you can demand maximum power when you need it, whilst the advanced construction with protective metal alloy outer casing keeps your battery safe, cool, and ready for action at the flying field or RC track.
Key Features
- Spektrum Smart Technology with Integrated Microchip — Every battery contains a data-rich microchip that stores vital information including battery brand, chemistry, cell count, capacity, charge/discharge cycles, C rating, temperature readings, and internal resistance. This means your Spektrum Smart charger knows exactly how to optimally charge your battery every single time, eliminating guesswork and user error that can damage batteries or reduce their lifespan.
- Automatic Smart Discharge Function — When programmed with a Spektrum Smart charger, this battery will automatically discharge itself to your predetermined safe storage voltage after a set time period (between 12 and 240 hours). This prevents the battery from sitting fully charged for extended periods, which degrades lithium polymer cell chemistry and shortens overall battery life. This unique feature is a genuine game-changer for RC enthusiasts who want their batteries to remain in peak condition season after season.
- Comprehensive Error Logging — The integrated memory stores a complete log of unhealthy events including over-charge, over-discharge, and over-temperature incidents. This invaluable data helps you make informed decisions about whether a battery is suitable for your specific RC application, ensuring you only use reliable packs for important flights or races.
- IC3 Connector with EC3 Compatibility — Equipped with the next-generation IC3 connector that includes a dedicated data transfer wire for communicating with Smart chargers, this battery is fully backwards compatible with existing EC3 connectors. You can use this Smart battery with older RC systems, though the full benefits of Smart technology are only realised when connected to a Spektrum Smart charger. The IC3 design provides superior heat resistance and a more solid electrical connection than traditional connectors.
- Protective Metal Alloy Outer Casing — The hard protective shell made from metal alloy does more than just shield the cells—it actively helps dissipate heat during discharge, maintains battery shape under stress, and significantly increases overall durability. This is especially important for RC aircraft where aerodynamic balance and battery reliability are critical to safe flight.
- High Continuous Discharge Rate of 30C — This 30C rating means the 4000mAh battery can safely supply 120 amps of continuous current (4000mAh × 30C = 120A), making it perfect for high-performance RC aircraft, powerful RC cars, and demanding RC applications that require sustained high power output without voltage sag.
- Customisable Charge Rates for Flexibility — The charge rate of every Smart battery is fully customisable, allowing you to take advantage of the maximum 5C charge rate (20 amps) for rapid turnaround at the field, or drop it down to 1C (4 amps) for overnight charging at home. The charger remembers your last setting, so your preferences are automatically applied on the next charge cycle.
- No Soldering Required — The IC3 connector comes pre-installed from the factory, meaning you can unbox this battery and use it immediately without any soldering, connector swaps, or assembly. This makes it ideal for RC enthusiasts of all skill levels, from beginners discovering RC flight for the first time to experienced competition pilots.
Technical Performance
The SPM 4000mAh 3S Smart LiPo is engineered with precision for RC aircraft and high-performance electric RC applications. The 11.1V nominal voltage (3 cells × 3.7V per cell) with 4000mAh capacity delivers a total energy capacity of 44.4 watt-hours, providing substantial flight time for RC planes ranging from small trainers to larger scale models. The 30C continuous discharge rating allows peak current draw of 120 amps, whilst burst capability supports even higher current demands for brief acceleration or climbing in RC aircraft. Construction utilises high-quality lithium polymer cells assembled into a compact package measuring 140mm (5.5 inches) in length, 43mm (1.69 inches) in width, and 24mm (0.94 inches) in height. The total weight is 230 grams (8.1 ounces), making it lightweight enough for small to medium RC aircraft whilst maintaining the structural integrity needed for durability. The battery features charge protection circuitry and short circuit protection for safety, plus a JST-XH balance connector for cell balancing during charging. The discharge lead is 60mm (2.36 inches) long with 12 AWG wire gauge, providing adequate current capacity, whilst the balance lead stretches 35mm (1.37 inches). Maximum charge current is rated at 20 amps with a standard 1C charge rate of 4 amps, allowing flexible charging from rapid field turnarounds to leisurely overnight charging. The protective metal alloy outer casing not only provides mechanical protection but actively manages heat dissipation during high-drain operations, critical for maintaining battery health and consistent performance throughout extended RC flying sessions.
What's in the Box
- SPM 4000mAh 3S 11.1V Smart LiPo Battery
- IC3 connector (pre-installed, data transfer wire included)
- JST-XH balance connector
Frequently Asked Questions
- What is Spektrum Smart battery technology and how does it benefit RC enthusiasts in the UK? — Spektrum Smart technology uses an integrated microchip inside the battery to store comprehensive data about that specific pack, including capacity, charge cycles, temperature history, and health status. When you connect the battery to a compatible Spektrum Smart charger, all this data automatically uploads and the charger configures itself optimally—no manual settings required. For UK RC pilots and drivers, this means faster field setup, better battery management, reduced risk of damage from incorrect charging, and longer battery lifespan because the Smart discharge function automatically stores batteries at the optimal voltage.
- Is the Spektrum 4000mAh 3S Smart battery suitable for beginners? — Yes, this battery is excellent for beginners thanks to Smart technology which eliminates the need to manually configure charge settings. However, you must pair it with a Spektrum Smart charger to access the Smart features. The no-soldering IC3 connector means immediate out-of-box usability. The 3S (11.1V) configuration is a standard voltage for many popular RC aircraft and RC cars, making it versatile across numerous beginner-friendly platforms.
- What RC aircraft and models can use this 4000mAh 3S battery? — This 11.1V 3S LiPo is designed for RC aircraft and high-performance RC applications. It's suitable for medium-sized RC planes, trainers, sport aircraft, and any electric RC model with a 3S battery requirement. The 4000mAh capacity provides excellent flight time whilst remaining lightweight. Check your specific RC aircraft's manual for its recommended battery specifications—this pack's 44.4 watt-hours fits the majority of 3S-compatible models.
- How does the 30C discharge rate compare to other RC batteries? — The 30C rating indicates this battery can safely discharge at 30 times its capacity per hour (4000mAh × 30C = 120 amps continuous). This is considered a high discharge rate suitable for high-performance RC aircraft and demanding RC applications. For comparison, slower batteries might offer 25C or 20C ratings; the 30C rating here ensures minimal voltage sag under heavy load, meaning better acceleration, climb rate, and overall responsiveness in your RC model.
- What charger do I need to use with this Smart LiPo battery? — To access all Smart features including automatic parameter upload, smart discharge, and customisable charge rates, you must use a Spektrum Smart charger compatible with IC3 connectors. The battery is backwards compatible with older EC3 connectors, so it can work with non-Smart chargers, but you'll lose the Smart technology benefits and must manually configure settings. For new RC setups in the UK, we recommend investing in a Spektrum Smart charger to maximise this battery's potential.
- How should I store this battery to maintain its health and lifespan? — When paired with a Spektrum Smart charger, this battery can be programmed to automatically discharge to safe storage voltage after 12 to 240 hours of inactivity. This prevents the damaging effects of storing lithium polymer cells at full charge, significantly extending battery life. If using a non-Smart charger, manually discharge to approximately 3.0 to 3.5 volts per cell (9.0 to 10.5V for a 3S pack) before storage, and keep the battery in a cool, dry place away from moisture and direct heat.
- Can I use this battery with non-Spektrum RC chargers? — Yes, the IC3 connector is backwards compatible with EC3 connectors, so this battery works with many standard chargers. However, you will only get the Smart features—automatic parameter upload, error logging, and smart discharge—when using a Spektrum Smart charger. Non-Smart chargers will work fine for basic charging, but you'll need to manually set charge rates and cannot access the battery's stored health data.
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 4000mAh 3S 11.1V Smart LiPo Battery 30C; IC3 O-SPMX40003S30 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.
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