- Battery type: LiPo
- Capacity: 300 mAh
- Cells: 1
- Connectors: Ultra Micro
- Voltage: 3.7 V
- Watt Hours: 1.1 Wh
- Battery Type: LiPo (Lithium Polymer)
- Capacity: 300mAh
- Voltage: 3.7V nominal (4.2V fully charged, 3.0V minimum safe discharge)
- Cell Configuration: 1S1P (one cell in series, one cell in parallel)
- Watt Hours: 1.1 Wh
- Maximum Continuous Discharge Rate: 25C
- Maximum Continuous Discharge Current: 7.5A (300mAh × 25C)
- Connector Type: PH 1.5 (Ultra Micro)
- Hard Case: No
- Length: 46mm
- Width: 18mm
- Height: 5mm
- Manufacturer: E-flite (Horizon Hobby)
- Model Number: EFLB3001S25
- Compatible Charger: E-flite EFLC1006 1S LiPo Charger
- Primary Application: Ultra-micro RC aircraft
- Compatibility: E-flite Radian UMX, E-flite B-25 UMX and other 1S PH 1.5 Ultra Micro equipped models
Overview
The E-flite 300mAh 1S 3.7V 25C LiPo Battery is a compact, lightweight power solution designed specifically for ultra-micro RC aircraft and other small-scale RC models. Whether you're flying the E-flite Radian UMX, exploring the world of electric RC flight, or powering compact RC cars and helicopters, this single-cell LiPo battery delivers reliable, consistent performance in an ultra-portable package. With its efficient 25C continuous discharge rating and robust energy storage, this battery is perfect for RC hobbyists in the UK who demand dependable power without unnecessary weight or bulk.
This battery represents the ideal balance between capacity and weight for ultra-micro RC applications. At just 300mAh, it's engineered to power small RC models with precision and longevity, making it an essential spare for anyone serious about their RC hobby. The battery is suitable for beginners looking to get started with compact RC aircraft, as well as experienced RC enthusiasts who need reliable replacement batteries to keep their fleet flying or running. Unlike larger capacity packs, the 300mAh format minimises weight penalty, crucial for maintaining flight characteristics and performance in lightweight RC designs.
RC Model Shop stocks this E-flite battery as part of our comprehensive range of RC spares and upgrades for customers across the UK. Whether you're a casual weekend flyer or a dedicated RC competitor, having spare batteries on hand is essential to maximise your flying or running time. This battery is an authorised E-flite product, guaranteeing genuine specifications and reliability you can trust.
Key Features
- 300mAh Capacity — This 300mAh energy storage delivers sufficient runtime for ultra-micro RC models whilst keeping overall weight to an absolute minimum, which is critical for maintaining optimal flight performance and handling characteristics in small-scale RC aircraft.
- 1S Single-Cell LiPo Chemistry — The single-cell configuration delivers a nominal 3.7V output, making this battery ideal for applications requiring single-cell power without the added bulk or complexity of multi-cell packs, whilst maintaining excellent voltage stability throughout the discharge cycle.
- 25C Continuous Discharge Rating — With a maximum continuous discharge rate of 25C, this battery can deliver 7.5 amps of continuous current, providing plenty of power headroom for responsive acceleration and sustained high-performance operation in compact RC models without voltage sag or performance compromise.
- PH 1.5 Ultra Micro Connector — The PH 1.5 Ultra Micro connector is the industry-standard plug type for ultra-micro RC aircraft, helicopters and compact RC vehicles, ensuring seamless compatibility with a wide range of E-flite and other branded ultra-micro models without requiring adapters or modifications.
- Lightweight Construction — Weighing just 11.1 grams (based on 1.1 Wh specification), this battery adds minimal weight to your RC model, preserving the nimble handling, flight duration and responsiveness that ultra-micro RC designs are engineered to deliver.
- No Hard Case Design — The absence of a protective hard case keeps weight to an absolute minimum, which is paramount in ultra-micro applications where every gram matters for flight performance, though the battery should be stored and handled with reasonable care to preserve longevity.
Technical Performance
The E-flite 300mAh 1S 3.7V 25C LiPo Battery is engineered with precision lithium-polymer chemistry that delivers consistent voltage output and reliable discharge characteristics throughout its operating window. The 25C continuous discharge rating means this battery can safely provide a maximum continuous current of 7.5 amps (300mAh × 25C = 7.5A), making it suitable for motors and ESCs (Electronic Speed Controllers) designed for single-cell operation. The 1S1P cell configuration (one cell in series, one cell in parallel) ensures a stable nominal voltage of 3.7V that remains consistent during moderate draw, with the voltage dropping gradually as the battery depletes. At full charge, the battery reaches approximately 4.2V per cell, whilst safe discharge typically continues until the battery reaches 3.0V per cell. The total energy storage capacity of 1.1 Watt-hours (300mAh × 3.7V) provides ample power for 15-30 minute flight or run times depending on motor load and driving style. This battery is manufactured to strict quality standards by Horizon Hobby, the parent company of E-flite, ensuring consistent performance, safety and longevity. The lightweight 300mAh format is specifically optimised for ultra-micro RC platforms where weight savings are absolutely critical to maintaining the intended flight characteristics and handling balance of the design.
What's in the Box
- E-flite 300mAh 1S 3.7V 25C LiPo Battery with PH 1.5 Ultra Micro connector
What You Need to Complete
- A compatible LiPo battery charger (such as the E-flite EFLC1006 1S charger) to safely charge this battery — standard consumer chargers should never be used with LiPo batteries as they lack the necessary safety cutoffs and balancing circuits
- An RC model with a compatible PH 1.5 Ultra Micro connector socket and ESC rated for 1S LiPo operation
Frequently Asked Questions
- What RC models is the E-flite 300mAh 1S LiPo battery compatible with? — This battery is designed for ultra-micro RC aircraft and compact RC models featuring a PH 1.5 Ultra Micro connector. It's specifically compatible with the E-flite Radian UMX and other E-flite Ultra Micro series aircraft. It can also power any 1S LiPo-compatible RC model with a matching PH 1.5 connector, including some compact RC helicopters and small RC cars, though you should verify your specific model's battery requirements before purchasing. The battery will not fit Blade mCPX helicopters or similar models requiring the EFLB1501S45 battery with different dimensions.
- What charger do I need for this battery? — The recommended charger for this 1S battery is the E-flite EFLC1006 1S LiPo charger, which provides safe, balanced charging with proper cutoff detection. Never attempt to charge LiPo batteries with standard consumer chargers, as they lack essential safety features and can cause battery damage or safety hazards. Always use a dedicated LiPo-compatible charger with balance-charging capabilities for optimal battery longevity and safety.
- What are the dimensions of this 300mAh battery? — The battery measures 46mm in length, 18mm in width, and 5mm in thickness (height), making it extremely compact and lightweight for ultra-micro applications. These exact dimensions ensure it fits properly into ultra-micro RC aircraft designs where space is severely limited.
- How long does this battery last on a single charge? — Runtime depends entirely on your RC model's motor size, ESC programming, flying or driving style and motor load. Typical flight times range from 15-30 minutes on a single charge for ultra-micro aircraft, though this varies significantly based on throttle usage and motor efficiency. Lighter models with efficient motors will achieve longer runtime, whilst models with continuous high-throttle operation will see shorter flight times.
- Is this battery suitable for beginners? — Yes, this battery is excellent for RC beginners, particularly those starting with ultra-micro RC aircraft like the E-flite Radian UMX. The 300mAh capacity and 25C discharge rating provide stable, predictable performance that's forgiving for new pilots or drivers. The lightweight design also helps maintain the intended handling characteristics of ultra-micro designs, making learning easier. However, beginners must invest in a proper LiPo charger and follow all safety guidelines when handling lithium-polymer batteries.
- Can I use this battery in a Blade mCPX helicopter? — No, this battery will not fit the Blade mCPX helicopter. The mCPX requires the EFLB1501S45 battery with different connector type and physical dimensions. Always verify your specific RC model's battery specifications before purchasing, as incompatible batteries can cause performance issues or potential safety concerns.
- Will this battery fit in an older UMX Radian model? — Yes, this battery should fit fine in older generation E-flite Radian UMX aircraft. The PH 1.5 Ultra Micro connector is the standard connector type for these models, ensuring reliable compatibility. However, if you're uncertain about your specific airframe version, contact our expert team at RC Model Shop and we'll confirm compatibility before you purchase.
- Can I use this battery to power a Spektrum Mini FPV camera? — Yes, the SPMVA1100 Spektrum Mini FPV camera can be powered from any 1S LiPo battery, so this 300mAh pack is compatible. The small capacity makes it ideal for lightweight FPV setups where minimising battery weight is crucial for maintaining optimal flight characteristics.
- What is the 25C discharge rating and why does it matter? — The 25C rating indicates the maximum continuous current the battery can safely deliver without overheating or damage. Multiplying the battery capacity (300mAh) by the discharge rating (25C) gives the maximum current: 300 × 25 = 7.5 amps maximum continuous draw. This generous discharge rating ensures the battery can power responsive motors and acceleration without significant voltage sag, delivering snappy performance and consistent throttle response throughout the flight or run.
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 300mAh 1S 3.7V 25C LiPo Battery 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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