O-GTC4S850-60X6

• Battery Type: Lithium Polymer (LiPo)
• Configuration: 4S1P (4 cells in series, 1 cell in parallel)
• Nominal Voltage: 14.8V (4S)
• Capacity: 850mAh
• Discharge Rating: 60C continuous
• Maximum Discharge Current: 51 amps (850mAh × 60C)
• Connector Type: XT60
• Case Type: Soft case
• Length: 60mm
• Width: 30mm
• Height: 30mm
• Weight: 109g
• Raw Materials: Lithium Polymer sourced from Japan and Korea
• Manufacturing Process: Advanced stacking technology
• Intended Use: Adventure RC cars, RC crawlers
• Proven Compatible Vehicles: Upgrade RC 4WD Bully II Crawler
• Model Number: O-GTC4S850-60X6
• Brand: Gens Ace
• Product Series: G-Tech

Overview

The Gens Ace Li-Po Car G-Tech 4S 14.8V 850mAh 60C Crawling battery is a compact and powerful LiPo pack specifically engineered for adventure RC cars and RC crawler applications. This 4S1P configuration delivers exceptional power output with a 60C discharge rating, making it an ideal choice for demanding crawling missions where consistent performance and reliable runtime are essential. Whether you're tackling rocky terrain in your RC crawler or pushing your adventure RC car to its limits, this battery offers the high-power delivery and extended runtime that serious RC enthusiasts demand.

Built using superior Lithium Polymer raw materials sourced from Japan and Korea, this Gens Ace battery benefits from advanced stacking technology that enables the single-cell configuration to achieve its full 850mAh capacity whilst maintaining a compact footprint. The G-Tech series has been carefully designed for RC cars that require dependable power in a small package, and it has proven compatibility with popular crawlers such as the Upgrade RC 4WD Bully II. For RC car enthusiasts in the UK looking for a high-performance 4S battery solution, the Gens Ace G-Tech 850mAh offers excellent value and proven reliability in a soft-case design that fits easily into tight battery compartments.

As a trusted UK RC retailer, RC Model Shop stocks genuine Gens Ace batteries with full manufacturer support. This particular model combines high discharge capability with genuine Japanese and Korean lithium polymer materials, ensuring you get authentic performance that cheaper alternatives simply cannot match. The XT60 connector is industry-standard and widely compatible across modern RC cars and crawlers, making integration straightforward for most setups.

Key Features

• 4S 14.8V Configuration — This battery delivers 4 cells in series for a nominal voltage of 14.8V, providing the power envelope needed for modern adventure RC cars and crawling applications where higher voltage translates to stronger torque and faster acceleration.
• 850mAh Capacity — The 850mAh capacity offers a good balance between runtime and weight, providing sufficient charge for extended crawling sessions without the weight penalty of larger capacity packs that would slow your vehicle unnecessarily.
• 60C Discharge Rating — With a continuous discharge rating of 60C, this battery can safely deliver up to 51 amps of current (850mAh × 60C), offering the high current output required for high-torque crawling motors and aggressive acceleration without voltage sag.
• 4S1P Cell Configuration — The single-pack design simplifies wiring and charging, reducing complexity whilst maintaining the voltage and capacity you need for reliable performance across extended crawler missions.
• Superior Japanese and Korean Materials — Gens Ace sources premium lithium polymer raw materials from Japan and Korea, ensuring superior cycle life, consistency, and safety compared to batteries using lower-grade materials.
• Advanced Stacking Technology — The proprietary stacking process allows Gens Ace to pack full capacity into a compact physical size, meaning this battery fits into tight battery bays without sacrificing performance or runtime.
• XT60 Connector — The XT60 connector is the industry standard for RC cars and crawlers in this power class, offering robust gold-plated contacts that resist corrosion and ensure reliable power delivery even in outdoor environments.
• Soft-Case Design — The soft case keeps weight to a minimum whilst still providing basic protection during transport and storage, making the battery easy to pack into rucksacks and vehicle bags for trips to the RC track.
• Proven Crawler Compatibility — This battery is specifically recommended for adventure RC car platforms including the Upgrade RC 4WD Bully II and similar crawlers that demand high-performance 4S power.

Technical Performance

The Gens Ace G-Tech 850mAh 4S battery represents a precision-engineered power solution for discerning RC crawler enthusiasts. With dimensions of 60mm length, 30mm width and 30mm height, this battery is remarkably compact for its power rating, allowing it to fit into modern RC crawler battery trays without requiring custom modifications or relocation of other components. Weighing just 109 grams, it provides an excellent weight-to-power ratio that won't bog down your vehicle's acceleration or climbing performance. The 14.8V nominal voltage (ranging from 16.8V fully charged to 12V when depleted) is perfectly suited to modern crawler ESCs and motors designed for 4S operation. The 60C discharge capability means this battery will not struggle even under the sustained high-current demands of low-speed crawling where motors are loaded to near stall conditions. For comparison, a 2200mAh 4S Gens Ace battery in the same product family delivers proportionally higher capacity but at significantly greater weight and size, whilst this 850mAh pack is optimised for weight-conscious builds where extended runtime is less critical than performance and manoeuvrability. The advanced stacking process used in manufacture ensures consistent cell balancing and internal resistance characteristics that translate to stable voltage delivery throughout the discharge cycle. Built from premium raw materials, this battery supports hundreds of charge-discharge cycles when properly maintained with a quality LiPo charger, making it a cost-effective long-term investment for serious RC car enthusiasts in the UK.

What's in the Box

• Gens Ace G-Tech 4S 14.8V 850mAh 60C LiPo battery pack with XT60 connector

What You Need to Complete

• Compatible RC crawler or adventure RC car with 4S-capable ESC
• XT60-compatible battery charger (2-4S capable LiPo charger recommended)
• Balancing leads for safe charging if your charger supports balance charging
• Optional: LiPo battery bag or fireproof storage container for safe storage and transport

Frequently Asked Questions

• Is this 4S LiPo battery suitable for my RC crawler? — If your RC crawler or adventure car is designed for 4S LiPo operation and features an XT60 connector, this Gens Ace battery is an excellent choice. It is specifically recommended for platforms like the Upgrade RC 4WD Bully II and similar 4S-compatible crawlers. Always verify that your vehicle's ESC is rated for 4S operation before purchasing, as using a 4S battery with a 3S-only ESC will damage the electronic speed controller.
• What is the 60C rating and why does it matter? — The 60C discharge rating indicates the maximum safe continuous current this battery can deliver, calculated by multiplying capacity by the C-rating (850mAh × 60C = 51 amps maximum). For RC crawlers with high-torque motors, sustained high current draw is normal during climbing and obstacles, so the 60C rating ensures the battery won't become a bottleneck limiting your vehicle's performance or causing excessive voltage sag that weakens motor output.
• How long will this battery last on a single charge? — Runtime depends entirely on your RC car's motor size, gear ratio, driving style and terrain. For typical RC crawling with sustained high current draw, expect 15 to 25 minutes of active running time before the battery depletes to safe minimum voltage. Lighter driving on smooth terrain will extend runtime, whilst aggressive crawling with continuous motor stall conditions will reduce it.
• Do I need a special charger for this 4S battery? — You will need a dedicated LiPo charger capable of handling 2-4S batteries. Standard NiMH chargers designed for older RC cars will not work with LiPo batteries and could create fire risk. Modern 2-4S balance chargers are widely available and affordable, typically costing between £20 and £50 in the UK. Balance charging (using the balance connector) is recommended to maintain cell voltage uniformity and maximise battery lifespan.
• Is the XT60 connector compatible with my RC car? — The XT60 is the industry standard connector for RC cars in the 4S power class, used across Traxxas, Arrma, Losi, FTX and most other modern RC manufacturers. If your RC car currently uses an XT60 connector on the ESC, this battery will plug in directly. If your car uses a different connector (Deans, T-plug, or EC3), you will need an XT60 adapter cable, available inexpensively from RC Model Shop.
• How should I store this LiPo battery when not in use? — LiPo batteries should be stored in a cool, dry location away from heat sources and direct sunlight. For periods of storage exceeding one week, it is recommended to discharge the battery to approximately 50% charge (around 14.4V for a 4S pack) using a LiPo charger with storage mode function. Store the battery in a fireproof LiPo bag or metal container, as this contains any potential fire risk should the battery fail. Never store LiPo batteries fully charged or fully depleted, as either extreme stresses the cells.
• What is the difference between this 850mAh pack and the larger 2200mAh Gens Ace 4S battery? — The primary difference is capacity and weight. The 850mAh pack weighs 109 grams and provides roughly 38% of the runtime of the 2200mAh pack (202 grams), making it ideal for weight-conscious builds where manoeuvrability and acceleration matter more than maximum session length. The 2200mAh offers extended runtime for longer crawling sessions but adds approximately 93 grams of weight that can noticeably affect climbing performance. Both use identical 4S14.8V voltage and 60C discharge characteristics, so either will work with the same crawler.

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 Car G-Tech 4S 14.8V 850mAh 60C Crawling with XT60 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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