Key Features
- Capable of maximum continuous discharge rates up to 30C
- Equipped with balancing leads and a connector that are compatible with most balancers and balancing chargers
- Equipped with JST connector on main power leads
- Perfect battery for small indoor 3D, aerobatic, sport, or scale airplanes using Park 300 and Park 370 motors on 3S applications.
Overview
E-flite High-Power Series Lithium Polymer Batteries offer an excellent blend of weight, power and performance. Available in a wide variety of capacities and voltages, there's a battery perfect for almost any application, from indoor slow flyer to large-scale sport and aerobatic airplane models as well as micro to mid-sized helicopter models.
- Brand: E-flite
- Model Number: EFLB4503SJ30
- Battery Type: Lithium Polymer (LiPo)
- Capacity: 450mAh
- Cell Configuration: 3S1P (3 cells in series)
- Number of Cells: 3
- Nominal Voltage: 11.1V (3.7V per cell)
- Discharge Rate: 30C continuous
- Maximum Continuous Discharge Current: 13.5A
- Energy Storage: 5.0 Wh (Watt-hours)
- Main Power Connector: JST
- Balance Connector: JST-ZH
- Wire Gauge: 18 AWG
- Charge Protection Circuit: No
- Length: 2.13 inches (54mm)
- Width: 1.18 inches (30mm)
- Height: 0.51 inches (13mm)
- Weight: 1.48 oz (42g)
- Applications: Small indoor 3D aerobatic aircraft, sport aircraft, scale model aircraft, micro to mid-sized helicopters
- Compatible Motors: Park 300 and Park 370 series
Overview
The E-flite 450mAh 3S 11.1V 30C LiPo Battery with JST connector is a compact, lightweight power solution specifically engineered for small-scale RC aircraft and helicopter applications. This high-performance lithium polymer battery delivers impressive power-to-weight ratio, making it the ideal choice for indoor 3D aerobatic flying, sport applications, and scale model aircraft that demand reliable energy in a minimal footprint. Whether you're flying Park 300 and Park 370 motor-equipped models or operating micro to mid-sized helicopter platforms, this battery offers the perfect balance of performance and portability for RC enthusiasts across the UK.
E-flite High-Power Series Lithium Polymer Batteries have earned recognition among RC pilots for their exceptional blend of weight, power and performance characteristics. Available in a comprehensive range of capacities and voltages, E-flite batteries are engineered to suit almost any RC application, from lightweight indoor slow-flyer models through to larger-scale sport and aerobatic aircraft, as well as micro and mid-sized helicopter designs. The 450mAh 3S configuration represents a sweet spot for operators seeking maximum performance without excessive weight penalties.
This battery is perfect for RC model builders and pilots who demand quality components from a trusted manufacturer. The JST connector ensures broad compatibility with most modern RC aircraft charging systems and balancers, whilst the balanced leads enable safe, efficient charging that extends battery lifespan and maintains optimal cell performance across all three cells.
Key Features
- 30C Maximum Continuous Discharge Rate — This battery is capable of delivering up to 30 times its capacity in amperes continuously, providing the sustained power delivery required for demanding aerobatic manoeuvres, aggressive 3D flying, and high-performance sport aircraft operations without voltage sag or performance degradation.
- Lithium Polymer Chemistry — LiPo batteries offer superior energy density compared to older NiCd and NiMH technologies, meaning you get more power from less weight—a critical advantage in RC aviation where every gram counts towards flight performance and duration.
- 3S Cell Configuration (11.1V) — Three cells in series deliver 11.1 volts nominal, providing adequate voltage for most small RC motors whilst maintaining safe operating parameters and excellent compatibility with Park-series motors and similar mid-range powerplants commonly used in RC aircraft.
- JST Connector on Main Power Leads — The industry-standard JST connector ensures seamless compatibility with the vast majority of RC aircraft speed controllers, receiver systems, and power distribution boards available in the UK market, eliminating the need for adapter cables or custom modifications.
- Integrated Balance Connector — Equipped with JST-ZH balance leads, this battery works with virtually all modern LiPo chargers and balancers, enabling cell-level voltage monitoring and balanced charging that ensures all three cells maintain equal charge states, maximising battery longevity and safety.
- Compact Lightweight Design — At just 42 grams and measuring 54mm × 30mm × 13mm, this battery minimises weight whilst maximising usable payload capacity, making it particularly suitable for small indoor 3D and aerobatic platforms where weight distribution and centre of gravity are critical performance factors.
- 18 AWG Wire Gauge — The 18 AWG power leads provide adequate current-carrying capacity for the 30C discharge rate whilst maintaining flexibility and ease of installation in confined airframe spaces typical of small RC aircraft.
- Perfect for Park Series Motors — This 450mAh 3S battery is specifically engineered as an ideal match for Park 300 and Park 370 series brushless motors, delivering the optimal voltage and current characteristics these motors demand for peak performance and reliability.
Technical Performance
This E-flite LiPo battery represents excellent engineering for small-scale RC aircraft applications. The 450mAh capacity delivers approximately 5.0 watt-hours of energy storage, sufficient for typical flights lasting 8-15 minutes depending on flying style, throttle management, and aircraft weight. The 30C discharge rate enables peak current delivery of 13.5 amps, providing robust power even during aggressive aerobatic manoeuvres, rapid climbs, or high-throttle sport flying. The three-cell series configuration generates 11.1 volts nominal output, which tapers to approximately 9 volts when fully discharged—this characteristic makes the battery suitable for a wide array of small brushless motors, traditional brushed outrunners, and specialised aerobatic power systems. Build quality throughout the battery is evident in the robust connector construction, reinforced balance leads, and sealed cell configuration that resists moisture ingress typical in UK flying conditions. The JST-ZH balance connector incorporates proper polarity protection and secure keying to prevent accidental reverse-polarity connections that could damage chargers or aircraft systems. Materials throughout are selected for durability and thermal stability, with the lithium polymer cells manufactured to strict tolerance specifications ensuring consistent performance across the battery's service life. The 18 AWG power leads offer low-resistance connections that minimise voltage drop during high-current discharge phases, maintaining crisp throttle response and consistent power delivery throughout your flight.
What's in the Box
- E-flite 450mAh 3S 11.1V 30C LiPo Battery
- Integrated JST connector on main power leads
- JST-ZH balance connector with three balance leads
What You'll Need to Complete
- LiPo-compatible charger with balance charging capability (most modern RC chargers support LiPo charging)
- RC aircraft or helicopter compatible with 3S LiPo batteries
- Speed controller rated for 3S operation
- Proper battery storage container for safe LiPo storage between flights
Frequently Asked Questions
- Is the E-flite 450mAh 3S battery suitable for beginner RC pilots? — Yes, this battery is well-suited for RC pilots at all experience levels. The 450mAh capacity is manageable for beginners, providing reasonable flight times without requiring advanced cell-balancing knowledge. However, you will need a LiPo-compatible charger and should familiarise yourself with basic LiPo safety procedures before operation. Always follow manufacturer charging instructions, never leave batteries unattended while charging, and store LiPo batteries in a fireproof container.
- What is the flight time I can expect from this battery? — Flight duration depends on your specific aircraft weight, motor efficiency, flying style, and throttle management. Typically, a 450mAh 3S LiPo provides 8-15 minutes of flight time for small RC aircraft. Gentler, more economical flying styles extend flight time, whilst aggressive aerobatic flying or continuous high-throttle operation reduces duration. Most RC pilots operating Park-series motor equipped aircraft report 10-12 minutes of solid flight time with this battery capacity.
- Is this battery compatible with my existing RC aircraft charger? — The JST connector on the main power leads is industry-standard and compatible with virtually all modern RC chargers sold in the UK market. The JST-ZH balance connector is equally universal. However, you must ensure your charger explicitly supports LiPo battery chemistry—older NiCd or NiMH-only chargers cannot safely charge lithium polymer batteries. If you're unsure, consult your charger manual or contact the manufacturer before attempting to charge.
- How should I store this battery between flights? — LiPo batteries should be stored in a cool, dry location at partial charge (approximately 3.7-3.85 volts per cell for long-term storage). Never store fully charged or fully discharged LiPo batteries. Use a dedicated LiPo storage bag or fireproof container. Check periodically for any signs of swelling, damage, or corrosion. Properly stored, a quality LiPo battery maintains performance and safety for 300+ charge cycles.
- What makes the 30C discharge rating important? — The 30C rating indicates this battery can safely discharge at 30 times its capacity in amps—for this 450mAh battery, that's a maximum continuous discharge of 13.5 amps. This rating ensures the battery can handle the sustained current demands of aggressive flying without voltage sag, overheating, or premature failure. Higher C-ratings provide more stable voltage delivery during demanding flight conditions.
- Can I use this battery with any Park series motor? — This battery is specifically engineered for Park 300 and Park 370 series motors. Before using with other motor types, verify that your motor's rated voltage matches the 11.1V nominal output of this 3S battery and that the motor's maximum current requirements do not exceed this battery's 13.5A continuous discharge capacity. Consult your motor's specification sheet for compatibility confirmation.
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 450mAh 3S 11.1V 30C LiPo, 18AWG JST 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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