Overview
The E-flite 3.7V 150mAh 1S 25C LiPo Battery (model EFLB1501S25) is a compact, lightweight power solution specifically designed for ultra-micro RC aircraft and helicopters. This battery represents the perfect match for anyone flying small-scale electric RC models, whether you're a seasoned RC hobbyist in the UK or just discovering the world of ultra-micro RC flight for the first time. With its convenient Ultra Micro connector and proven compatibility with some of the most popular RC aircraft platforms available, this battery delivers reliable performance in a package that weighs just around 9 grams—making it ideal for weight-conscious applications where every gram counts.
Ultra-micro RC models have become increasingly popular with RC enthusiasts across the UK because they offer genuine flying performance, manoeuvrability and enjoyment in a footprint small enough to fly in parks, gardens and indoor spaces where larger RC aircraft cannot operate. The E-flite 150mAh 1S battery is engineered to power some of the best-selling ultra-micro platforms on the market today, including the Blade Nano CP X, Blade Nano QX, Blade mCX and Blade mCX2 helicopters, as well as the ParkZone UMX range and HobbyZone Champ and Duet aircraft. Whether you're looking for a replacement battery to extend your flying sessions, or building up a spare battery collection to keep your ultra-micro flying adventures going all day long, this E-flite pack delivers the performance and reliability that both beginners and experienced RC pilots expect from this trusted brand.
The 25C discharge rating provides excellent power delivery for spirited flying and acrobatic manoeuvres, whilst the 1S1P cell configuration keeps the design simple and lightweight. With Velcro included in the pack, installation in your ultra-micro model is straightforward, and the battery arrives ready to charge and fly. This is a genuine E-flite product, manufactured to the same exacting quality standards that have made E-flite batteries the choice of RC pilots worldwide.
Key Features
- Ultra Micro Connector — The PH 1.25 Ultra Micro connector is the standard fitment for the vast majority of ultra-micro RC aircraft and helicopters, including all Blade Nano and mCX models, ensuring simple, secure connection to your aircraft without the need for adapters or modifications.
- Lightweight Construction — At approximately 9 grams, this battery has been engineered to minimise weight penalty on ultra-micro models where every gram directly impacts flight performance, responsiveness and endurance.
- 25C Continuous Discharge Rating — The 25C rating provides sufficient current delivery for dynamic flying characteristics, allowing your ultra-micro aircraft to perform aerobatic manoeuvres, rapid climbs and aggressive turns without voltage sag compromising control authority.
- 3.7V Single-Cell Chemistry — The 1S1P configuration provides a nominal voltage of 3.7V, which is perfectly matched to the power system specifications of modern ultra-micro aircraft, eliminating the need for voltage regulation and keeping the design efficient.
- Quick-Charge Capability — With a maximum charge rate of 3C (0.45 amps), you can recharge this battery in approximately 20 minutes, allowing you to get back in the air quickly between flights without waiting hours for recharge cycles.
- Velcro Installation Strips Included — The battery arrives with adhesive Velcro strips pre-attached, allowing you to secure the pack in your model's battery compartment easily and safely, with the option to change batteries without tools or modifications.
- Proven Compatibility — This battery is an original E-flite part designed to be a standard or optional upgrade for dozens of popular ultra-micro aircraft models, meaning it will fit and work correctly with your model without compatibility concerns.
- Genuine E-flite Product — As an authentic E-flite battery manufactured by Horizon Hobby, you receive genuine quality, genuine performance and genuine reliability, with access to genuine technical support and spare parts.
Technical Performance
The E-flite 150mAh 1S 25C LiPo battery represents modern lithium-polymer battery engineering optimised specifically for the demands of ultra-micro RC flight. The 150mAh capacity delivers approximately 0.5 watt-hours of energy storage, which translates to flight times typically ranging from 5 to 10 minutes depending on your flying style, model weight and power system efficiency. The 25C discharge rating is calculated on a 150mAh capacity, meaning the battery can safely deliver a continuous discharge current of 3.75 amps, which is more than sufficient for the small brushless motors and flight control systems found in modern ultra-micro aircraft. The LiPo chemistry provides superior power-to-weight ratio compared to older nickel-based battery technologies, meaning you get more flight time and better performance from the lightest possible battery weight. The 1S1P configuration—one cell in series, one cell in parallel—keeps the pack simple, affordable and lightweight. The PH 1.25 Ultra Micro connector has become the industry-standard fitment for ultra-micro models, providing a secure, reliable electrical connection that resists accidental disconnection whilst remaining simple to connect and disconnect by hand. The battery's nominal voltage of 3.7V per cell is precisely matched to modern brushless motor and ESC combinations designed for ultra-micro aircraft, eliminating the voltage regulation losses that would occur with multi-cell packs. With proper charging and storage procedures, these batteries deliver consistent performance flight after flight, season after season, making them a reliable foundation for regular RC flying.
What's in the Box
- E-flite 3.7V 150mAh 1S 25C LiPo Battery with PH 1.25 Ultra Micro connector
- Pre-installed Velcro adhesive strips for battery mounting
Compatibility
This battery is compatible with the following ultra-micro RC aircraft and helicopters: Blade Nano CP X, Blade Nano QX, Blade mCX, Blade mCX2, ParkZone UMX Radian, HobbyZone Champ, HobbyZone Duet, ParkZone UM Night Vapor, ParkZone Ember 2, ParkZone UM T-28 Trojan and ParkZone UM P-51D Mustang. It will also fit models using the following product codes: BLH1550, BLH2800, BLH3000, BLH3200, BLH3300, BLH3380, BLH7600, BLH7680, BLH8700, BLH8780, EFL9050, EFL9080, EFLH2480, EFLU1280, EFLU2980, EFLU3080, EFLU6600, EFLU6680, EFLU6780, HBZ4400, HBZ4480, HBZ4900, HBZ5300, PKZU1080, PKZU1980, PKZU2180, PKZU2400 and PKZU2480.
Frequently Asked Questions
- What is the weight of the E-flite 150mAh 1S battery? — This battery weighs approximately 9 grams, making it one of the lightest power solutions available for ultra-micro RC aircraft. This minimal weight is critical for ultra-micro models where battery weight directly impacts flight performance, climb rate, endurance and agility.
- What is the maximum charge rate for this battery? — The maximum safe charge rate is 3C, which calculates to 0.45 amps for the 150mAh capacity. This allows you to recharge the battery in approximately 20 to 30 minutes using a compatible charger such as the Spektrum SPMXC1060 or SPMXC1040.
- Can I use a higher-capacity battery like the 200mAh version in my ultra-micro aircraft? — Many ultra-micro models can accommodate the larger E-flite 200mAh 1S battery (model EFLB2001S45) as an alternative, which provides extended flight time at the expense of slightly increased weight. Always check your model's battery compartment dimensions and weight limits before upgrading, as some models may have tight space constraints.
- Is this battery suitable for beginners? — Yes, absolutely. This battery is ideal for beginners because it is a standard or optional part for many beginner-friendly ultra-micro RC aircraft models such as the HobbyZone Champ and HobbyZone Duet. The simple 1S configuration requires no complex balancing procedures, and the included Velcro strips make installation straightforward. Any compatible charger designed for 1S LiPo batteries will work with this pack.
- What charger should I use? — You will need a charger capable of charging 1S LiPo batteries at rates up to 3C (0.45 amps). The Spektrum SPMXC1060 and SPMXC1040 are recommended options that work excellently with E-flite 1S batteries. Any quality 1S LiPo charger from a reputable RC brand will be suitable.
- How long will this battery last between charges? — Flight time typically ranges from 5 to 10 minutes depending on your model, flying style and power system efficiency. Smooth, level flying extends battery life, whilst aggressive aerobatics and rapid climbs reduce flight time. Most pilots carry multiple charged batteries to maximise their flying session length.
- Does this battery come with Velcro? — Yes, the battery arrives with adhesive Velcro strips pre-installed, allowing you to secure the pack in your model's battery compartment immediately. This is convenient for quick battery swaps between flights.
- Can I use a 25C battery in a model that specifies a 45C battery? — Yes, you can use the 25C version in place of the higher-discharge-rate 45C version, as the 25C battery is fully compatible with any model designed for 1S LiPo batteries with an Ultra Micro connector. The primary difference is that the 45C battery provides higher maximum current capability, which is rarely fully utilised in ultra-micro models. Both batteries will charge with the same charger.
- What makes this battery suitable for ultra-micro RC flight? — This battery combines the essential characteristics for ultra-micro flight: minimal weight (9 grams), proven compatibility with industry-standard connector types and power systems, sufficient power delivery for dynamic flying characteristics, and proven reliability from a trusted manufacturer. Ultra-micro models require batteries that deliver reliable performance in a package light enough not to compromise flight characteristics.
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 150mAh 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.
