- Battery Type: LiPo (Lithium Polymer)
- Voltage: 7.4V nominal
- Voltage per Cell: 3.7V
- Capacity: 300mAh
- Number of Cells: 2S (2 cells in series)
- Connector Type: PH
- Discharge Rate: 30C continuous
- Maximum Continuous Discharge Current: 9 Amps
- Maximum Charge Rate: 0.9 Amps (3C)
- Discharge Lead Length: 2 inches (51mm)
- Hard Case: No
- Product Weight: 17g
- Product Length: 1.65 inches (42mm)
- Product Width: 0.74 inches (19mm)
- Product Height: 0.47 inches (12mm)
- Application: UMX 2S airplanes
Overview
The Spektrum 7.4V 300mAh 2S 30C LiPo Battery is a premium power solution specifically designed for UMX 2S RC airplanes and other small-scale RC aircraft. This compact yet powerful lithium polymer battery delivers consistent, reliable energy for demanding flight applications, making it an essential component for anyone serious about RC flying. Whether you're a seasoned RC enthusiast looking for spare batteries to extend your flying sessions, or a beginner stepping into the world of electric-powered RC aircraft in the UK, this Spektrum LiPo battery offers the performance and reliability you need.
Built to Spektrum's exacting standards, this 2S battery pack provides the perfect balance of weight, capacity and discharge capability for UMX platform aircraft. At just 17 grams, the lightweight design ensures minimal impact on your aircraft's performance whilst delivering plenty of punch when you need it. The genuine Spektrum battery comes with a PH connector, offering secure and reliable power connections that integrate seamlessly with compatible aircraft and charging systems. When you choose Spektrum RC batteries in the UK, you're investing in products that are engineered for consistent performance, longevity and safety.
RC aircraft demands precision and dependability, and that's exactly what this battery delivers. The 7.4V nominal voltage output (rated at 3.7V per cell) provides excellent power delivery across a range of flight conditions, whilst the robust 30C continuous discharge rate ensures your aircraft has access to all the power it needs at the moment it needs it. For RC hobbyists searching for reliable LiPo batteries online, Spektrum's reputation for quality engineering speaks for itself.
Key Features
- Perfect for UMX 2S Aircraft — This battery is specifically designed for Spektrum's UMX 2S RC airplanes, meaning it offers optimised performance for these aircraft types and ensures compatibility out of the box without requiring adaptors or modifications.
- Lightweight Design at 17 Grams — The minimal weight ensures your RC aircraft maintains optimal flight characteristics and performance, without sacrificing the power and runtime you need for enjoyable flying sessions.
- High 30C Continuous Discharge Rate — The 30C discharge capability translates to a maximum continuous discharge current of 9 Amps, providing immediate power delivery when you push your aircraft's performance envelope and need responsive, snappy throttle response.
- PH Connector Type — The standard PH connector ensures reliable electrical connections and compatibility with a wide range of UMX aircraft and charging systems, eliminating the worry about connector compatibility issues.
- 2-Cell (2S) Lithium Polymer Construction — The dual-cell design provides a nominal voltage of 7.4V, which is the standard for many small-scale RC aircraft, delivering the perfect balance of performance and flight characteristics.
- Compact Dimensions — Measuring just 1.65 inches long, 0.74 inches wide and 0.47 inches tall, this battery fits neatly into tight battery compartments whilst delivering impressive power output relative to its size.
- 2-Inch Discharge Lead Length — The 51mm (2 inch) pre-attached discharge lead provides convenient connection to your aircraft's power system whilst remaining short enough to avoid tangling or creating balance issues in your model.
- Maximum 0.9 Amp Charge Rate — The conservative 3C maximum charge rate ensures safe, controlled charging that extends battery lifespan and minimises stress on the cells, making this battery perfect for regular use.
Technical Performance
The Spektrum 7.4V 300mAh 2S LiPo battery represents thoughtful engineering optimised for the specific demands of small-scale RC aircraft. With a capacity of 300mAh, this battery strikes an excellent compromise between weight and usable flight time, allowing pilots to enjoy extended sessions without the excessive mass that larger capacity batteries would impose. The 30C continuous discharge rate, capable of delivering 9 Amps maximum continuous discharge current, ensures that even aggressive flying demands are met with responsive, consistent power delivery. The battery's construction follows lithium polymer technology, with each of the two cells rated at 3.7V nominal voltage, providing the 7.4V output that UMX aircraft are specifically designed to use. The engineering behind the PH connector and the 51mm discharge lead demonstrates Spektrum's attention to practical usability—the lead length has been carefully calculated to provide convenient connection without adding unnecessary weight or creating balance complications in your aircraft. The maximum charge rate of 0.9 Amps (3C) represents a conservative, battery-friendly charging protocol that prioritises longevity and safety. The compact physical dimensions—measuring 42mm in length, 19mm in width and 12mm in height—make this battery suitable for aircraft with tight battery compartments, yet the materials and cell quality ensure reliable performance across the full range of flight conditions you're likely to encounter. Whether you're cruising at steady flight or performing aerobatic manoeuvres, this battery delivers consistent voltage output and dependable power characteristics that experienced RC pilots demand.
What's in the Box
- Spektrum 300mAh 2S 7.4V 30C LiPo Battery with PH/UMX Connector
What You Need to Complete
- Compatible Charger (such as a Spektrum or third-party LiPo-compatible charger)
- PH/UMX Charge Lead
Frequently Asked Questions
- Is the Spektrum 7.4V 300mAh 2S LiPo battery suitable for RC aircraft beginners? — Absolutely. This battery is purpose-built for UMX aircraft, which are specifically designed for newer pilots and hobbyists. The 300mAh capacity provides sufficient flight time for enjoyable sessions, and the PH connector offers foolproof compatibility. Beginners should ensure they have an appropriate LiPo charger and charge lead before flying, and always follow safe charging practices.
- What is the maximum discharge current and what does 30C mean? — The 30C rating means the battery can safely discharge at 30 times its capacity continuously. With a 300mAh capacity, this translates to 9 Amps of maximum continuous discharge current. This rating ensures your aircraft receives responsive, immediate power whenever you demand it during flight.
- How long will one battery flight session last with 300mAh capacity? — Flight time depends on your aircraft's power system, flying style and weather conditions. Generally, a 300mAh 2S battery will provide 5-15 minutes of flight time on most UMX aircraft, though this varies significantly based on how aggressively you fly. Having multiple batteries allows you to enjoy extended flying sessions.
- What charger do I need for this battery? — You'll need a LiPo-compatible charger capable of charging 2S batteries via the PH connector. Spektrum offers dedicated chargers for this purpose, but many third-party LiPo chargers are compatible. Always ensure your charger supports 2S LiPo batteries and has the correct connector type, and charge at the maximum safe rate of 0.9 Amps (3C).
- Is this battery safe to use and what precautions should I take? — LiPo batteries are safe when handled correctly. Charge only with appropriate LiPo chargers, never over-discharge batteries below 3.0V per cell, avoid physical damage or punctures, and store in a cool, dry location. Never leave charging batteries unattended, and follow all safety guidelines provided by Spektrum.
- What does the 51mm discharge lead mean? — The discharge lead is the wire attached to the battery connector. At 51mm (approximately 2 inches) length, this is the standard length for UMX aircraft, providing a convenient connection point without excessive length that could complicate battery installation or affect aircraft balance.
- Can I use this battery in non-UMX aircraft? — The battery is specifically designed for UMX aircraft, though it may work in other 2S-capable models if they feature a compatible PH connector. Always verify your aircraft's battery requirements before installation, as using incorrect voltage batteries can damage your aircraft's electronics.
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 300mAh 2S 30C LiPo Battery: PH O-SPMX3002S30 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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