E-flite 3.7V 500mAh 1S 25C LiPo, High Current UMX Connector EFLB5001S25UM is compatible with the following models:
A-BLH2280
A-BLH9180
A-BLH9600
A-BLH9680
A-BLH9700
- Battery Type: Lithium Polymer (LiPo)
- Capacity: 500 mAh
- Cells: 1S (single cell)
- Nominal Voltage: 3.7V
- Watt Hours: 1.9 Wh
- Discharge Rate: 25C continuous
- Maximum Continuous Discharge Current: 12.5 amps
- Connector Type: High Current UMX
- Compatible Models: Blade 120 S2, Blade Glimpse, and other UMX-equipped E-flite micro aircraft and helicopters
- Compatible with: Blade 120 SR, Blade 130X, Blade 120 S and other micro helicopter platforms with UMX connectors
Overview
The E-flite 500mAh 1S 3.7V 25C LiPo battery with High Current UMX connector is a premium power solution designed for micro RC helicopters and ultra-micro RC aircraft. This compact yet powerful battery delivers exceptional performance in a lightweight package, making it the ideal choice for serious RC enthusiasts in the UK who demand reliability and consistent power delivery. Whether you're flying the Blade 120 S2, Blade Glimpse or other compatible UMX-equipped models, this battery provides the energy and current capacity needed for extended flight sessions and responsive control.
Engineered by E-flite, a leader in electric RC flight technology, this 1S LiPo battery represents the perfect balance between capacity and weight. The high 25C discharge rate ensures your micro helicopter or aircraft has access to peak current whenever you need it, whether performing aggressive aerobatics, climbing quickly, or maintaining stable hover. The proprietary High Current UMX connector provides a secure, reliable connection that minimises voltage drop and maximises power transfer efficiency. If you're searching for a quality RC battery UK or upgrading your micro helicopter power system, this is a trusted solution backed by decades of RC aviation expertise.
At just 500mAh capacity with 1.9 Watt Hours, this battery is lightweight enough to maintain the excellent flight characteristics of ultra-micro aircraft whilst delivering sufficient energy for meaningful flight times. The single-cell 3.7V nominal voltage is the industry standard for micro electric RC models, ensuring perfect compatibility with a vast range of micro helicopter batteries and RC aircraft power systems. This is the genuine E-flite part, not a clone or third-party alternative, guaranteeing authentic performance and safety.
Key Features
- High Current 25C Discharge Rate — This specification means the battery can safely deliver 25 times its capacity in amps continuously, providing 12.5 amps of current when needed. For micro helicopters and aircraft, this high discharge capability ensures responsive throttle response, quick climb performance and the ability to execute aggressive manoeuvres without voltage sag.
- 500mAh Lithium Polymer Capacity — The 500 milliamp-hour capacity is precisely calibrated for ultra-micro aircraft and helicopters, offering sufficient flight time (typically 5-8 minutes of active flying) without adding unnecessary weight that would compromise aircraft performance and agility.
- 1S LiPo Chemistry — The single-cell lithium polymer design delivers 3.7V nominal voltage, the universal standard for micro RC aircraft. This voltage is matched to the electronic speed controllers and power systems in compatible models, ensuring optimal performance and component longevity.
- High Current UMX Connector — This proprietary connector system developed by E-flite offers superior current handling compared to standard connectors, reducing resistance and voltage drop whilst providing a positive mechanical connection that won't loosen during flight or rough landings.
- 1.9 Watt Hours Total Energy — The total energy capacity of 1.9Wh is optimised for micro-scale RC flight, balancing flight duration with the weight and space constraints of ultra-micro helicopters and aircraft designs.
- Genuine E-flite Manufacturing — This is an authentic E-flite product, not a counterfeit or third-party clone, guaranteeing the advertised performance specifications, safety standards and build quality that makes E-flite batteries the choice of serious RC pilots across the UK and worldwide.
- Broad Model Compatibility — This battery is designed to fit and power a comprehensive range of ultra-micro RC models including Blade micro helicopters and compatible aircraft platforms, making it a versatile addition to your RC battery collection.
Technical Performance
The E-flite 500mAh 1S 25C LiPo battery represents precision engineering optimised for the demanding requirements of ultra-micro RC flight. The 25C continuous discharge rate, combined with the 500mAh capacity, provides 12.5 amps of available current — more than sufficient for the brushless motors and electronic speed controllers found in modern micro helicopters and aircraft. The High Current UMX connector minimises internal resistance, ensuring that the voltage available at the motor remains stable even during high-current demand situations such as rapid climbs or aggressive manoeuvres. Built using quality lithium polymer cells, this battery delivers consistent voltage output throughout its discharge cycle, which is critical for maintaining stable flight characteristics and precise control response. The 3.7V nominal voltage of this 1S pack matches the requirements of the Blade 120 S2, Blade Glimpse and numerous other UMX-compatible micro RC aircraft, ensuring perfect integration without the need for adapters or modifications. The lightweight design, achieved through rigorous engineering and material selection, ensures that the battery does not compromise the power-to-weight ratio of your micro helicopter or aircraft. For UK RC enthusiasts operating micro helicopters indoors or in small outdoor spaces, this battery delivers the reliable power needed for consistent performance session after session.
What's in the Box
- E-flite 500mAh 1S 3.7V 25C LiPo Battery
- High Current UMX connector pre-installed
What You Need to Complete
- Compatible RC aircraft or micro helicopter with UMX connector (such as Blade 120 S2, Blade Glimpse or similar E-flite micro models)
- 1S LiPo-compatible charger with UMX connector support (such as Spektrum Smart Micro 4 Port AC/DC 1S LiPo Charger or E-flite 180 QX HD 1S USB LiPo Charger)
- Spare batteries recommended for extended flying sessions, as single-battery flight times are typically 5-8 minutes
Frequently Asked Questions
- What is the difference between 25C and other discharge ratings on RC LiPo batteries? — The 25C rating indicates continuous discharge capacity. A higher C rating like 25C means the battery can safely deliver higher current without overheating. This 25C battery can provide 12.5 amps continuously (500mAh × 25C), which is essential for the responsive performance required in micro helicopter flying, especially during aggressive manoeuvres or rapid climbs where motor demand spikes. Lower-rated batteries would experience voltage sag and reduced performance.
- Is this battery compatible with my Blade 120 S2 micro helicopter? — Yes, the E-flite 500mAh 1S 3.7V 25C LiPo battery with High Current UMX connector is fully compatible with the Blade 120 S2 and other E-flite micro helicopters and aircraft equipped with UMX connectors. Check your aircraft's manual or connector type before purchasing to confirm compatibility.
- What flight time should I expect from this 500mAh battery? — Typical flight times range from 5-8 minutes of active flying, depending on the specific aircraft model, flying style, battery condition and environmental factors such as temperature. More aggressive flying with constant climbing and manoeuvres will reduce flight time compared to gentle, level flight.
- Can I use this battery in cold weather? — Lithium polymer batteries perform best at temperatures between 15-25°C. Cold temperatures reduce available capacity and peak current delivery. Warm the battery to room temperature before flying in winter conditions for optimal performance and safety.
- What charger do I need for this battery? — You need a charger specifically designed for 1S LiPo batteries with UMX connector compatibility. Popular options include the Spektrum Smart Micro 4 Port AC/DC 1S LiPo Charger and the E-flite 180 QX HD 1S USB LiPo Charger. Always use a quality charger designed for lithium polymer batteries to ensure safety and battery longevity.
- How long will this battery last before needing replacement? — LiPo batteries typically maintain good performance for 100-300 charge cycles, depending on charging practices, storage conditions and usage patterns. Properly stored and charged batteries will last several years of regular use. Always inspect the battery for swelling or damage before each flight session.
- Is this suitable for beginners flying micro helicopters? — Yes, this battery is perfectly suitable for beginners. The 500mAh capacity provides adequate flight time to practice basic helicopter skills, and the reliable E-flite design with High Current UMX connector ensures consistent, predictable performance that helps new pilots focus on developing their flying skills rather than worrying about power delivery.
- What does the UMX connector provide compared to standard battery connectors? — The High Current UMX connector is purpose-designed for E-flite micro aircraft to provide superior current handling, minimal voltage drop, and a secure mechanical connection that resists loosening during flight. This means more available power at the motor and more reliable electrical performance compared to smaller standard connectors.
- Can I store this battery long-term? — Yes, LiPo batteries should be stored at approximately 50% charge in a cool, dry location (ideally around 15-20°C). Do not store fully charged or fully depleted. If storing for more than a month, check the charge level monthly and top up if needed to maintain the 50% state of charge. Proper storage significantly extends battery lifespan.
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 EFL 500mAh 1S 3.7V 25C LiPo High Current UMX Connector O-EFLB5001S25UM 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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