Overview
The E-flite 3300mAh 4S 14.8V 50C LiPo is ideal for 25-36 size airplanes as well as 15-size ducted fan airplanes. E-flite 50C Li-Po batteries provide the extra punch needed for the most demanding 3D maneuvers, while still providing a lightweight power solution.
- Brand: E-flite
- Model Number: O-EFLB33004S50
- Battery Type: Lithium Polymer (LiPo)
- Capacity: 3300 mAh
- Voltage: 14.8V nominal
- Cell Configuration: 4S (4 cells in series)
- Discharge Rate: 50C continuous
- Maximum Discharge Current: 165A (3300mAh × 50C)
- Watt Hours: 48.8Wh
- Connector Type: EC3 (gold-plated)
- Internal Wiring: 12AWG
- Recommended Aircraft Size: 25-36 size electric aeroplanes
- Compatible with: 15-size ducted fan aircraft
- Application: 3D aerobatic flying, high-performance RC aircraft
- Fully Charged Voltage: Approximately 16.8V (4.2V per cell)
- Minimum Safe Discharge Voltage: 12.0V (3.0V per cell)
Overview
The E-flite 3300mAh 4S 14.8V 50C LiPo battery with EC3 connector is a premium power solution designed for RC aircraft enthusiasts who demand reliable, high-performance energy storage. This lithium polymer battery is purpose-built for 25-36 size electric aeroplanes as well as 15-size ducted fan aircraft, making it an ideal choice for serious RC plane flyers across the UK looking to upgrade their flying experience. Whether you're an experienced RC hobbyist or someone who has been flying RC models for years, this battery delivers the consistent power and performance needed to keep your aircraft flying at its best.
E-flite is renowned for manufacturing high-quality RC batteries and electronics, and this 50C discharge rate LiPo represents the upper echelon of performance batteries available to RC aircraft operators. The 50C specification means this battery can safely deliver extremely high discharge currents, providing the extra punch necessary for the most demanding 3D aerobatic maneuvers whilst still maintaining a lightweight power profile. For competitive flyers and weekend hobbyists alike, a high-discharge LiPo battery like this one transforms your RC flying capabilities, offering responsive power delivery and sustained performance throughout extended flying sessions.
At 3300mAh capacity with a 4S (14.8V nominal) configuration, this battery strikes an excellent balance between power and weight—two critical factors in RC aircraft performance. The generous 48.8 watt-hour energy storage means longer flight times and more opportunities to enjoy your RC plane without constant battery swaps. The EC3 connector is a widely recognised and trusted standard in the RC hobby, ensuring straightforward compatibility with most modern RC aircraft electrical systems.
Key Features
- 50C Discharge Rate — This high continuous discharge capability ensures the battery can supply maximum power whenever your aircraft demands it, whether during aggressive 3D flying, high-speed aerobatic passes, or sustained high-throttle operations. A 50C rating means the battery can safely deliver 165 amps continuously (3300mAh × 50C = 165A), which is essential for performance-orientated flying.
- 3300mAh Capacity — The 3300 milliamp-hour capacity provides substantial energy storage, translating to longer flight durations compared to smaller capacity batteries. This larger capacity means fewer battery changes during a flying session and more time enjoying your RC aircraft at the field or in the air.
- 4S LiPo Configuration (14.8V Nominal) — Four lithium polymer cells in series deliver a nominal voltage of 14.8 volts, which is the standard configuration for many mid to large-sized RC aircraft. This voltage level provides excellent performance characteristics whilst remaining safe and manageable within properly configured RC electrical systems.
- EC3 Connector — The gold-plated EC3 connector is an industry-standard connection method widely used across the RC hobby in the UK and internationally. This connector type offers excellent electrical conductivity, secure mating, and straightforward compatibility with most modern RC aircraft receivers and speed controllers.
- Lightweight Design — Lithium polymer battery technology delivers high energy density whilst keeping overall battery weight minimal. This lightweight approach is absolutely critical in RC aircraft, where every gram impacts flight performance, manoeuvrability, and endurance.
- Ideal for 25-36 Size Aircraft — This battery is specifically matched to the power requirements of medium to large-sized RC electric aeroplanes in the 25-36 size category, ensuring optimal performance without oversizing or undersizing your power source.
- Compatible with 15-Size Ducted Fan Aircraft — If you operate ducted fan electric aircraft, this battery provides excellent power for 15-size fan units, delivering the responsive thrust needed for dynamic flight performance.
- 12AWG Internal Wiring — The 12 AWG gauge internal battery wiring is correctly sized to handle the high currents this 50C battery can deliver without excessive voltage drop or heat generation, ensuring maximum power reaches your motor and ESC.
Technical Performance
This E-flite LiPo battery represents excellent engineering and construction quality typical of E-flite products trusted by RC enthusiasts across the UK. The 50C discharge capability is a significant specification that separates this battery from lower-performance alternatives; it's specifically engineered for high-current draw applications where sustained, responsive power delivery is non-negotiable. The 14.8V nominal voltage (4S configuration) sits at the sweet spot for many mid-range and high-performance RC aircraft motors, offering sufficient voltage to achieve excellent performance whilst remaining within safe operating parameters for modern RC electronics. The 3300mAh capacity combined with the 50C discharge rate yields a maximum peak current capability of 165 amps, making this battery suitable for motors ranging from approximately 350-400 watts of continuous power draw. The watt-hour rating of 48.8Wh (calculated as 14.8V × 3.3Ah) provides quantifiable energy storage, useful for calculating expected flight times and comparing against alternative battery options. The EC3 connector is constructed with gold-plated contacts to minimise electrical resistance, ensuring clean power delivery from battery to aircraft electronics. The 12AWG internal wiring specification is appropriately rated for the maximum discharge currents, preventing voltage sag and heat generation that would otherwise compromise performance. Build quality is consistently high with proper cell balancing and protection circuits to maintain safe operation and maximise the lifespan of the battery pack.
What's in the Box
- E-flite 3300mAh 4S 14.8V 50C LiPo battery
- EC3 connector (pre-installed)
What You Need to Complete
- Compatible RC aircraft with 4S LiPo battery compartment and EC3 connector
- LiPo battery charger suitable for 4S LiPo batteries (with balancing capability recommended)
- Battery monitoring device or voltage checker (recommended for safe operation)
- Appropriate battery storage case for safe storage when not in use
Frequently Asked Questions
- What does 50C mean on an RC LiPo battery? — The 50C specification refers to the discharge rate multiplier, which determines the maximum current the battery can safely deliver. It's calculated by multiplying the battery's capacity in amp-hours by the C rating; in this case, 3.3Ah × 50 = 165 amps maximum continuous discharge. A 50C rating indicates a high-performance battery suitable for demanding applications like competitive 3D flying.
- Is this battery suitable for beginners flying RC aircraft? — Whilst this is an excellent quality battery, beginners should ensure their aircraft and electronic speed controller are rated for 4S LiPo power. The high discharge capability of a 50C battery makes it most valuable for experienced flyers performing aggressive maneuvers; beginners might find a lower C-rated battery equally suitable for basic flying and training.
- What aircraft does this battery work with? — This battery is designed specifically for 25-36 size electric aeroplanes and 15-size ducted fan aircraft. You must verify that your aircraft's electrical system is rated for 4S LiPo power and features an EC3 connector or suitable adapter.
- How long will this battery last per charge? — Flight time depends on your aircraft's weight, motor efficiency, flying style, and throttle management. Typical flight times range from 8-20 minutes depending on these variables. The 3300mAh capacity provides substantial energy for extended flights compared to smaller capacity options.
- Can I use this battery with my RC plane's charger? — You must use a charger specifically designed for LiPo batteries with 4S capability. Standard NiMH or NiCd chargers are incompatible and dangerous. Check your charger's specifications to ensure it supports 4S LiPo charging and includes cell balancing functionality.
- How does this compare to the EFLB32004S40 battery? — The EFLB32004S40 features 3200mAh capacity with a 40C discharge rate, whilst this battery offers 3300mAh capacity with a superior 50C discharge rate. The higher capacity and discharge rate in this model provide greater power delivery and slightly longer flight times, making it better suited for demanding 3D flying and aerobatic applications.
- Is the EC3 connector standard? — Yes, the EC3 connector is an industry-recognised standard used extensively across the RC hobby in the UK and worldwide. It provides secure mating and excellent electrical conductivity, though you should verify your aircraft features EC3 connectors or carry suitable adapters if using older equipment.
- What is the voltage when fully charged? — A fully charged 4S LiPo battery reads approximately 16.8 volts (4.2V per cell × 4 cells). The 14.8V specification represents the nominal voltage; never discharge below approximately 3.0V per cell (12.0V total) to avoid permanent damage.
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 3300mAh 4S 14.8V 50C LiPo, 12AWG EC3 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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