- Brand: Spektrum
- Model Number: O-SPMX3003SJ30
- Battery Type: Lithium Polymer (LiPo)
- Cell Configuration: 3S (3 cells in series)
- Nominal Voltage: 11.1V
- Fully Charged Voltage: 12.6V
- Capacity: 300mAh
- Continuous Discharge Rate: 30C
- Maximum Continuous Discharge Current: 9 amps
- Connector Type: JST O-SPMX
- Chemistry: Lithium Polymer
- Application: Small-scale RC aircraft, micro quadcopters, lightweight RC vehicles
- Suitable Charger Type: Dedicated 3S LiPo charger with balance charging capability
Overview
The Spektrum SPM 11.1V 300mAh 3S 30C LiPo Battery is a compact, high-performance lithium polymer power cell designed for small-scale RC models and micro aircraft. Whether you're flying tiny drones, operating small RC cars, or powering portable RC devices, this 3S LiPo battery delivers consistent, reliable energy with the compact footprint and lightweight characteristics that make it ideal for applications where space and weight are critical considerations. Spektrum is the recognised leader in spread spectrum technology and RC electronics, and their battery products reflect the same engineering excellence and quality you'd expect from this trusted manufacturer.
This battery is perfect for RC enthusiasts in the UK who demand quality power sources for their hobby equipment. The 300mAh capacity combined with a 30C discharge rating means you get meaningful runtime with responsive power delivery, making it suitable for a wide range of small-scale RC applications from indoor flight to lightweight ground-based models. Whether you're a seasoned RC car UK enthusiast looking for spare batteries or someone just discovering ready to run RC models, having quality backup power is essential for extending your flying or driving sessions.
At just 11.1 volts across three cells, this is a genuine 3S LiPo configuration that provides excellent power density in a minimal package. The JST connector (O-SPMX) is a standard, widely-used connector type found on many small RC models, making this battery a versatile addition to your RC collection.
Key Features
- 3S LiPo Configuration — Three lithium polymer cells in series provide 11.1V nominal voltage, which is the standard 3S configuration recognised across the RC hobby and delivers the performance characteristics expected from modern RC power systems.
- 300mAh Capacity — The 300 milliamp-hour capacity is perfectly matched to small-scale RC aircraft, micro quadcopters, and lightweight RC vehicles, providing sufficient runtime without adding unnecessary weight to your model.
- 30C Continuous Discharge Rating — The 30C rating means this battery can safely discharge at 9 amps continuous current, giving you responsive acceleration and reliable power delivery for dynamic flying and driving. This rating provides a good balance between performance and safety across typical small RC applications.
- JST O-SPMX Connector — The JST O-SPMX connector is a standard connection type used on many Spektrum and compatible RC models, making this battery immediately compatible with a wide range of small-scale RC equipment without requiring adapters.
- Spektrum Quality and Reliability — Manufactured by Spektrum, a company with decades of expertise in RC technology, this battery undergoes rigorous quality control to ensure consistent performance, safety and longevity across repeated charging and discharge cycles.
- Lightweight Design — At just 300mAh, this battery weighs very little, making it ideal for applications like RC quadcopters, FPV drones, and other models where every gram counts towards flight time and performance.
Technical Performance
The SPM 11.1V 300mAh 3S 30C LiPo Battery represents a carefully engineered balance between capacity, discharge rate and physical size. The three-cell lithium polymer configuration delivers 11.1 volts nominal (12.6V fully charged), which is the standard voltage for 3S systems used throughout the RC hobby. The 30C continuous discharge rating equates to a maximum safe discharge current of 9 amps, providing sufficient power for responsive performance in small-scale models. Lithium polymer technology offers superior energy density compared to older battery chemistries, meaning you get more power in less space and weight. This makes it particularly suitable for applications like micro RC helicopters, small FPV racing drones, lightweight RC cars and other models where weight savings directly translate to improved performance. The battery's construction uses quality materials and manufacturing processes that Spektrum is known for, ensuring consistent cell balance, minimal internal resistance, and reliable performance across the battery's operational lifespan. When properly maintained with appropriate chargers and storage practices, LiPo batteries like this one will provide hundreds of charge cycles, making them a cost-effective power solution for regular RC operators in the UK.
What's in the Box
- Spektrum SPM 11.1V 300mAh 3S 30C LiPo Battery with JST O-SPMX connector
Frequently Asked Questions
- What models is this battery compatible with? — This battery features a JST O-SPMX connector, making it compatible with any RC model that uses this standard connection type. If you're unsure whether your model accepts this connector, check your device's manual or contact RC Model Shop for compatibility advice. Spektrum batteries with this connector are widely used on small-scale RC aircraft and lightweight models.
- How long does it take to charge this battery? — Charge time depends on your charger's output capacity. With a typical small LiPo charger, you can expect charge times ranging from 30 to 60 minutes. Always use a dedicated LiPo charger that supports 3S batteries; never attempt to charge LiPo batteries with conventional battery chargers, as this can damage the battery and create safety risks.
- Is this suitable for beginners in the RC hobby? — Yes, this battery is appropriate for beginners, particularly if your ready to run RC model or ready to run RC aircraft uses a JST O-SPMX connector and requires 3S LiPo power. However, beginners should take time to learn proper LiPo battery handling, storage and charging procedures. Never leave a charging LiPo battery unattended, store batteries in a cool place away from flammable materials, and always balance-charge your batteries using appropriate equipment.
- What is the difference between 30C and higher C-ratings? — The C-rating indicates how many times the battery capacity can be safely discharged in one hour. A 30C rating means this 300mAh battery can discharge at 9 amps continuously. Higher C-ratings (like 50C or 100C) allow greater discharge currents, which suits high-performance models and racing applications, but the 30C rating of this battery is perfectly adequate for small-scale recreational flying and driving, providing excellent performance without unnecessary cost.
- How should I store this battery? — Store LiPo batteries in a cool, dry place away from direct sunlight and heat sources. Ideally, keep them at a storage charge (around 3.85V per cell, or approximately 11.5V total) rather than fully charged or fully discharged. Never store a damaged or swollen battery, and always store LiPo cells away from children and pets.
- What is the voltage of a fully charged 3S LiPo battery? — A fully charged 3S LiPo battery reaches approximately 12.6 volts (4.2V per cell), dropping to 11.1 volts nominal during use, and should not be discharged below 3.0 volts per cell (9.0 volts total) to preserve cell longevity.
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 11.1V 300mAh 3S 30C LiPo Battery: JST O-SPMX3003SJ30 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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