Etronix 2S 30cm Balance Lead Extension Wire JST-XH ET0245

Overview

The Etronix 2S 30cm Balance Lead Extension Wire (JST-XH) is an essential accessory for RC enthusiasts in the UK who work with 2S LiPo battery packs. Whether you're a dedicated RC car UK hobbyist, a ready to run RC user, or someone who builds and maintains brushless RC systems, this practical extension lead solves a common problem: accessing balance connectors that are tucked away or positioned deep within a chassis. This straightforward yet indispensable component has been designed with the pit mechanic and home builder in mind, offering genuine flexibility without requiring any modifications to your main power wiring.

Balance connectors are critical for safe charging and battery maintenance, allowing chargers and balance boards to monitor individual cell voltages and ensure even charging across your 2S pack. When your battery sits deep in the chassis or is otherwise difficult to access, reaching the balance connector can be frustrating. That's where this extension lead makes all the difference. At 30 centimetres in length, it provides enough reach to route your balance plug to an accessible location, keeping your pit area organised and your charging setup convenient. The Etronix brand is recognised across the RC hobby community for producing reliable, no-nonsense components that work first time, and this balance lead extension is no exception.

For anyone running 2S LiPo batteries with JST-XH connectors—whether in RC cars, drones, or other RC models—this extension is a must-have addition to your toolkit. It's ideal for day-to-day pit use and works with any charger or balance board that accepts standard JST-XH 2S connectors, making it a genuinely universal solution for the UK RC community.

Key Features

• 2S Balance Lead Extension — This is a dedicated extension specifically designed for 2S LiPo battery packs, allowing you to extend the reach of your balance connector without needing to modify or replace your battery wiring, keeping everything clean and professional.
• 30 Centimetre Length — The approximate 30 cm length provides substantial reach to route your balance plug from deep within a chassis or battery compartment to your charging station or balance board, eliminating the frustration of short factory connectors.
• JST-XH Connector Compatibility — This extension uses the standard JST-XH connector type, which is the industry-standard connector found on the vast majority of 2S LiPo batteries and all modern balance chargers and balance boards, ensuring broad compatibility across your RC collection.
• Neat Cable Management — By routing your balance connector separately, you avoid the need to run cables through tight spaces or compromise your main power setup, helping you maintain a clean, organised chassis layout and pit area.
• Plug-and-Play Installation — No soldering, no modifications, and no complex setup required; simply connect one end to your battery's balance connector and the other to your charger or balance board, and you're ready to charge safely and conveniently.
• Pit-Ready Design — Engineered for everyday use in competitive or recreational settings, this lead is straightforward, reliable, and built to withstand regular plug-and-unplug cycles without wear or connectivity issues.
• Flexible Routing Options — The 30 cm length gives you complete flexibility to route your balance connector however works best for your setup, whether that's alongside your main power lead, through a side opening, or along the top of your chassis.

Technical Performance

The Etronix 2S 30cm Balance Lead Extension Wire has been engineered for straightforward, dependable performance in everyday RC pit use. Built from quality materials with proper insulation and secure JST-XH connectors, this extension maintains the integrity of your battery monitoring system, which is essential for safe LiPo charging practices. The JST-XH connector standard is the globally recognised industry standard for 2S balance connections, meaning this extension will work with every modern charger and balance board on the market—whether you're using a basic two-cell balance board or an advanced multi-chemistry smart charger. The 30 centimetre length has been carefully chosen to provide genuine reach for most RC chassis designs whilst remaining flexible and easy to route. The lead itself is finished to withstand the demands of regular pit work, with connector contacts that maintain reliable electrical connection through repeated connection cycles. For anyone running a 2S LiPo-powered RC car, truck, buggy, or other model, this extension ensures you can always reach your balance connector safely and conveniently without compromising your vehicle's wiring integrity or requiring any soldering or modifications whatsoever.

What's in the Box

• 1x Etronix 2S 30cm Balance Lead Extension Wire with JST-XH connectors

Frequently Asked Questions

• What is a balance lead extension and why would I need one for my RC car? — A balance lead extension allows you to extend the reach of your 2S LiPo battery's balance connector, which is used during charging to monitor individual cell voltages. If your battery is mounted deep in your RC car's chassis or in a location that's difficult to access, a balance extension makes it easy to route the connector to a convenient location near your charger, eliminating the need to remove your battery or disassemble your vehicle just to charge it safely.
• Is this extension compatible with my 2S LiPo battery and charger? — Yes, if your battery uses a JST-XH balance connector and your charger or balance board has a JST-XH 2S socket, this extension will work perfectly. The JST-XH connector is the industry-standard format for 2S balance leads, so this extension offers broad compatibility across the UK RC market.
• Can I use this extension with 3S or 4S batteries? — No, this extension is specifically designed for 2S LiPo packs. Using it with higher cell-count batteries would be unsafe and could damage your charger or balance board. Always match the cell count to your extension and charger.
• Is this suitable for beginners? — Absolutely. This is one of the simplest RC accessories you can use—there's no soldering required and no technical knowledge needed. Simply plug one end into your battery and the other into your charger. It's an essential tool for any RC beginner learning to charge and maintain their batteries safely.
• How long is 30 centimetres in practical terms? — 30 centimetres is approximately one foot, which is enough length to route your balance connector from a battery tucked under a body shell or mounted in the centre of a chassis all the way to your charger station. In most 1/10 and 1/8 scale RC vehicles, this length is more than sufficient for easy pit-side access.
• Will this extension affect my charging speed or safety? — No. Balance lead extensions do not carry high current—they only carry the small monitoring signal to the charger. The extension has no impact on charging speed, safety, or battery performance. Your charger communicates with each cell individually through this connection, exactly as it would with a factory-length balance lead.

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 ETRONIX 2S 30CM BALANCE LEAD EXTENSION WIRE (JST-XH) ET0245 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.