Gens Ace 2S 7.4V 300mAh 45C LiPo Battery JST-SYP BEC O-G2S0300-45JST

• Brand: Gens Ace
• Part Number: O-G2S0300-45JST
• Barcode: 6928493310366
• Battery Configuration: 2S (2 cells in series)
• Nominal Voltage: 7.4V
• Fully Charged Voltage: 8.4V
• Capacity: 300mAh
• Discharge Rating: 45C continuous
• Maximum Discharge Current: 13.5A (calculated at 45C)
• Battery Type: Lithium Polymer (LiPo)
• Cell Configuration: 2S1P (2 cells in series, 1 parallel)
• Connector Type: JST-SYP
• BEC: Integrated Battery Elimination Circuit (BEC)
• Case Type: Soft Case
• Weight: 18g
• Length: 40mm
• Width: 20mm
• Height: 12mm
• Recommended Application: Horizon UMX aeroplanes
• Manufacturer: Gens Ace (battery corporation with 20 years battery technology experience, 200+ professional engineers and technicians)

Overview

The Gens Ace Li-Po 2S 7.4V 300mAh 45C with BEC (O-G2S0300-45JST) is a premium lightweight lithium polymer battery pack designed specifically for small-scale RC models where weight and compact size are critical performance factors. Built by Gens Ace, one of the world's top-ranking battery corporations with over 20 years of battery technology expertise and a team of 200 professional engineers and technicians, this battery represents the brand's unwavering commitment to excellent quality, optimisation and priority in sales and services. Whether you're an experienced RC enthusiast looking to upgrade your small-scale aircraft or a hobbyist discovering the world of RC for the first time, this battery delivers reliable power in a form factor that simply cannot be matched by heavier alternatives.

The 2S 300mAh configuration makes this battery ideal for Horizon UMX aeroplanes and other compact RC models that demand minimal weight without compromising on power delivery. The 45C discharge rating ensures consistent, responsive performance during aggressive manoeuvres and high-demand flying sessions. With Gens Ace's reputation for producing NIMH, LI-PO and LI-FE batteries of exceptional quality, you can trust this pack to deliver the reliability and performance you expect from a premium RC battery. The soft case construction protects the cells during storage and transport, whilst the JST-SYP connector ensures secure, reliable connections to your RC equipment.

RC hobbyists throughout the UK and beyond trust Gens Ace batteries for their micro and small-scale RC aircraft, helicopters and ground vehicles. If you're searching for a high-quality 2S LiPo battery for your UMX aeroplane or other compact RC models, this is the battery that serious RC enthusiasts choose.

Key Features

• 2S Configuration (7.4V nominal) — This two-cell lithium polymer setup delivers the ideal voltage for small-scale RC models, providing sufficient power for responsive flight and ground performance whilst maintaining the lightweight profile that micro-scale aircraft demand.
• 300mAh Capacity — The 300mAh capacity is perfectly balanced for compact RC models, offering sufficient energy density for extended flight times without adding unnecessary weight that would compromise your model's performance and agility.
• 45C Discharge Rating — The 45C continuous discharge rating ensures this battery can deliver high current output when you need it most, enabling explosive acceleration, sharp manoeuvres and consistent power delivery throughout your flight or driving session.
• Ultra-Lightweight Design at 18g — Weighing just 18 grams, this battery is engineered for minimal weight addition to your RC model, preserving the responsiveness and flight characteristics that small-scale aircraft are renowned for.
• Compact Physical Dimensions — At 40mm length, 20mm width and 12mm height, this battery fits neatly into the tight spaces of small RC models, making installation straightforward and allowing you to achieve optimal weight distribution.
• JST-SYP Connector with BEC — The JST-SYP connector is a robust, industry-standard connection interface that ensures secure power delivery to your RC model's electrical systems, whilst the integrated BEC (Battery Elimination Circuit) simplifies your power distribution setup.
• Soft Case Protection — The soft case construction protects your battery during storage, transport and handling, reducing the risk of cell damage and extending the service life of your investment.
• Gens Ace Quality Assurance — As a product from a corporation with two decades of battery technology expertise and over 200 professional engineers and technicians dedicated to quality control, you receive a battery manufactured to the highest standards of performance and reliability.
• Ideal for Horizon UMX Aircraft — This battery is specifically suited for Horizon UMX aeroplanes, a range of popular micro-scale aircraft loved by RC enthusiasts across the UK for their impressive performance and durability.

Technical Performance

The Gens Ace Li-Po 2S 7.4V 300mAh 45C battery represents a masterclass in balancing performance with practicality for small-scale RC models. The 45C continuous discharge rating means this battery can safely deliver up to 13.5 amps of current (300mAh × 45C), making it more than capable of powering the brushless motors, servo systems and flight control electronics found in modern micro-scale RC aircraft. The 2S configuration (two lithium polymer cells in series) provides a nominal voltage of 7.4 volts with a fully charged voltage of 8.4 volts, perfectly suited to the voltage requirements of small-scale RC equipment designed around this power level. The ultra-lightweight 18-gram construction ensures minimal impact on your model's weight budget—critical when flying micro-scale aircraft where every gram matters for flight performance, battery life and manoeuvrability. Built using premium lithium polymer cell technology with a soft case design, this battery is engineered to withstand the demands of regular use whilst protecting the delicate internal cells from physical damage. The JST-SYP connector has become the industry standard for small-scale RC applications, ensuring compatibility with most Horizon UMX aeroplanes and other compact RC models. Gens Ace's 20 years of dedicated battery research and development means every aspect of this battery's design—from cell chemistry to internal resistance to thermal management—has been optimised for reliable, consistent performance across thousands of charge cycles.

What's in the Box

• Gens Ace Li-Po 2S 7.4V 300mAh 45C battery pack with JST-SYP connector and integrated BEC
• Soft case protective sleeve

Frequently Asked Questions

• Is this battery suitable for my Horizon UMX aeroplane? — Yes, Gens Ace specifically recommends this 2S 7.4V 300mAh 45C battery for Horizon UMX aircraft. The voltage, capacity and physical dimensions are optimised for these popular micro-scale RC aeroplanes. Before installation, always verify that your specific UMX model is compatible with 2S lithium polymer batteries.
• How much flight time will I get from this 300mAh battery? — Flight time depends on multiple factors including your flying style, throttle settings, wind conditions and the weight of your specific RC model. Generally, you can expect between 7 and 12 minutes of flight time from a 300mAh battery in a micro-scale aeroplane, though aggressive aerobatic flying will reduce this figure.
• What does the 45C discharge rating mean? — The 45C rating indicates the battery's maximum safe continuous discharge current. Multiply the capacity (300mAh or 0.3Ah) by 45 to get the maximum current output: 0.3 × 45 = 13.5 amps. This high discharge rating enables responsive, powerful performance even during demanding flight manoeuvres.
• How do I charge this Gens Ace 2S battery? — You will need a lithium polymer (LiPo) battery charger that supports 2S charging. Set your charger to 2S mode, configure the charge current (typically 1C, which equals 300mA for this battery), and connect the battery using the JST-SYP connector or a compatible balance charger connector. Never overcharge LiPo batteries, and always monitor charging.
• Is the JST-SYP connector the right plug for my RC model? — The JST-SYP is an industry-standard connector for small-scale RC applications and is widely used across Horizon UMX aeroplanes and other compact models. If your RC equipment uses a different connector type, you will need an adapter lead to maintain compatibility.
• Why is the soft case important? — The soft case provides protection against physical impacts, punctures and cell damage during transport and storage. This helps extend the battery's lifespan and reduces the risk of internal cell failure that could compromise performance or safety.
• What is the integrated BEC and why does it matter? — BEC stands for Battery Elimination Circuit. The integrated BEC allows the battery to provide both high-current power to motors and lower-voltage power to your receiver, servo systems and flight control electronics, simplifying your electrical wiring and reducing the need for additional power distribution components.
• How should I store this battery when not in use? — Store your Gens Ace 2S LiPo battery in a cool, dry location away from direct sunlight. For long-term storage lasting more than two weeks, charge the battery to approximately 50% capacity (around 3.7 volts per cell, or 7.4 volts for a 2S pack). This half-charge state preserves cell chemistry and extends overall battery lifespan.
• Is this battery suitable for beginners in RC hobbies? — The Gens Ace 2S battery is perfect for beginners flying Horizon UMX aircraft. However, you will need to ensure you have the proper charging equipment and understand basic LiPo battery safety practices. Always read your RC model's instruction manual to confirm battery compatibility before purchase.
• What makes Gens Ace batteries different from other brands? — Gens Ace is one of the world's top-ranking battery manufacturers with 20 years of dedicated research and development in NIMH, LI-PO and LI-FE battery technologies. Their team of 200 professional engineers and technicians maintains unwavering standards for quality, optimisation and customer service—factors that translate into batteries you can trust for reliable, consistent performance across thousands of charge cycles.

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 GENSACE Li-Po 2S 7.4V 300mAh 45C with BEC O-G2S0300-45JST 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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