SPM 3.7V 1S 10,500 mAh TX Batt: iX20 O-SPMB10500LITX

Overview

The Spektrum O-SPMB10500LITX 3.7V 10,500mAh Li-Ion battery is the official stock replacement battery engineered specifically for the Spektrum iX20 20-channel DSMX transmitter. This high-capacity internal power solution represents essential equipment for RC pilots across the UK who demand extended flight sessions without the frustration of mid-day recharging interruptions. Whether you're operating a competitive racing setup, conducting long-range telemetry monitoring, or simply enjoying extended flying sessions at your local RC flying field, this replacement battery delivers the reliable power and endurance that modern DSMX radio systems require.

As an RC enthusiast in the UK, you understand that transmitter reliability directly impacts your flying experience. The iX20 transmitter is a flagship Android-based DSMX radio system packed with advanced features including Wi-Fi connectivity, Bluetooth wireless capabilities, and a high-resolution touchscreen interface. All of these features demand consistent, dependable power delivery—which is exactly what the O-SPMB10500LITX battery provides. This isn't just any replacement battery; it's a purpose-built solution that understands the demands placed on modern RC transmitters and delivers the performance you need for competitive events, long-range FPV operations, and recreational flying alike.

Designed as a direct replacement for the original iX20 transmitter battery, this 1S LiPo-equivalent pack integrates seamlessly into the transmitter's internal bay without requiring any modifications. With 10,500mAh of energy storage capacity, you'll experience substantially longer operating sessions compared to standard transmitter batteries, allowing you to focus on your flying rather than constantly monitoring power levels. The compact form factor and intelligent design mean this battery fits where it's supposed to fit, works exactly as Spektrum intended, and delivers the professional-grade performance you expect from genuine Spektrum products.

Key Features

• 10,500mAh Capacity — This extended-capacity battery stores significantly more energy than standard transmitter packs, allowing RC pilots to operate their iX20 transmitter for extended periods during multi-flight sessions, competitive events, or long-range telemetry monitoring without requiring mid-session recharging, which is particularly valuable during full-day RC flying sessions at UK clubs and flying fields.
• Official Spektrum Stock Replacement — This is the genuine OEM replacement battery specified by Spektrum for the iX20 20-channel DSMX transmitter, meaning you're installing the exact battery that Spektrum engineered to work with this radio system, guaranteeing full compatibility and optimal performance.
• 3.7V Single-Cell LiIon Configuration — The battery uses a single-cell LiIon chemistry (3.3V nominal per cell) that provides stable voltage delivery throughout the discharge cycle, ensuring your Android-based transmitter maintains consistent performance and display brightness from full charge to the final moments of battery life.
• XH-1S Connector System — The battery features Spektrum's proprietary XH-1S connector, which ensures secure, foolproof integration with your iX20 transmitter and compatibility with Spektrum's complete smart charging ecosystem, allowing you to charge via USB or dedicated smart chargers.
• Direct-Fit Design — Measuring 3.34 inches in length, 2.75 inches in width, and 0.98 inches in height, this battery installs directly into the iX20's internal power bay without requiring any modification, modification plates, or external power packs that would compromise the transmitter's ergonomics or portability.
• Smart Power Delivery for Android OS Features — The battery supports all advanced features of the iX20's Android-based operating system, including telemetry monitoring, real-time data transmission, Wi-Fi and Bluetooth wireless connectivity, and full touchscreen operation without voltage sag or performance degradation.
• Extended Runtime During Telemetry Operations — With 10,500mAh of capacity, the battery provides exceptional runtime during telemetry-rich flight environments where transmitter power consumption is higher due to active data processing, wireless connectivity, and high-resolution display operation.
• Reliable Power for Competitive Flying — For RC pilots competing in races, freestyle events, or long-range FPV operations, this battery eliminates the anxiety of transmitter battery depletion mid-event, allowing you to focus entirely on your flying technique and performance rather than power management.

Technical Performance

The Spektrum O-SPMB10500LITX represents cutting-edge battery engineering optimised for the demanding requirements of modern RC transmitter systems. The 10,500mAh capacity is specifically calibrated to deliver extended runtime whilst maintaining the compact internal form factor that makes the iX20 transmitter portable and ergonomic for long flying sessions. The LiIon chemistry provides superior energy density compared to older NiMH battery technology, meaning you get more than double the runtime in a battery that weighs no more than its predecessors. The 3.7V single-cell configuration (3.3V nominal per LiIon cell) delivers stable voltage output from full charge down to the battery's minimum usable voltage, ensuring your transmitter's Android operating system, Wi-Fi module, Bluetooth radio, and high-resolution touchscreen display all maintain consistent performance throughout the discharge cycle. The XH-1S connector incorporates both power contacts and data pins for smart charging integration, allowing the battery to communicate with Spektrum's chargers for optimised charge profiles, charge status reporting, and cell balancing. The compact dimensions of just 85 x 70 x 25 millimetres ensure the battery fits within the iX20's internal compartment with proper clearance and support structure, whilst the 3.34-inch length ensures compatibility with the transmitter's internal power bay design. This is a genuine Spektrum engineering solution that understands every aspect of the iX20 transmitter's design, power requirements, and operational demands.

What's in the Box

• Spektrum O-SPMB10500LITX 3.7V 10,500mAh LiIon transmitter battery with XH-1S connector

Frequently Asked Questions

• Is this battery compatible with my Spektrum iX20 transmitter? — Yes, absolutely. This is the official OEM stock replacement battery specified by Spektrum for the iX20 20-channel DSMX transmitter. It features the correct XH-1S connector, correct voltage (3.7V), and correct physical dimensions to fit the internal power bay without any modification or adaptation.
• How much longer will this battery allow me to fly compared to the standard battery? — The 10,500mAh capacity is the highest-capacity battery available for the iX20 transmitter. Compared to the original battery, you can expect substantially extended runtime—typically several additional hours of continuous transmitter operation. This is especially noticeable during multi-flight sessions where the extended capacity means you won't need to recharge between flights.
• Can I use this battery in other Spektrum transmitters? — No, this battery is specifically designed for the iX20 20-channel DSMX transmitter and features the XH-1S connector that matches only the iX20 power bay. Do not attempt to use this battery in other transmitter models, as it will not physically fit and could damage both the battery and the transmitter.
• What charging methods does this battery support? — The XH-1S connector is compatible with Spektrum's complete smart charging ecosystem. You can charge this battery directly in the transmitter via the transmitter's USB charging port, or you can remove it and charge it using a dedicated Spektrum smart charger that supports XH-1S connectors. The smart charging system will optimise the charge profile for maximum battery longevity and performance.
• Why is this battery discontinued according to the manufacturer? — Spektrum has discontinued this particular model in favour of newer battery designs and formulations. However, RC Model Shop maintains stock of discontinued batteries to support existing iX20 transmitter owners who require replacement batteries. If you own an iX20 transmitter and your battery has reached the end of its service life, this is still the appropriate replacement solution.
• Is this suitable for beginners? — This battery is not a beginner product in the sense that it's not a learning tool—it's a replacement component for people who already own an iX20 transmitter. If you own an iX20 transmitter and are a beginner RC pilot, this battery will work perfectly for you, as it's the exact battery Spektrum specified for this transmitter model.
• How long will this battery last before it needs replacing? — LiIon batteries typically maintain good performance for 300-500 complete charge cycles under normal operating conditions. With proper storage, charging practices, and maintenance, you can expect 2-3 years of service life from this battery. Signs that replacement is needed include reduced runtime, sluggish performance, or the transmitter failing to power on despite a full charge.
• What makes LiIon batteries better than older NiMH transmitter batteries? — LiIon batteries offer approximately double the energy density of NiMH batteries, meaning the O-SPMB10500LITX stores significantly more energy in the same physical space. They also maintain more stable voltage throughout the discharge cycle, meaning your transmitter performs consistently from full battery down to low battery. Additionally, LiIon batteries don't suffer from the memory effect that plagued older NiMH batteries.

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 SPM 3.7V 1S 10,500 mAh TX Batt: iX20 O-SPMB10500LITX 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.

We want to make sure your delivery goes smoothly, so here are some important details about our service:

• For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
• Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
• Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
• If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
• We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
• As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
• If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
• For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.

• Used In

SPMR20100EU

SPM iX20 20-Channel Smart Transmitter P-SPMR20100EU

£1,888.00

27/05/2026 Stock expected soon

Out Of Stock

SPMR20110EU

SPM iX20 SE Special Edition 20-Channel Smart Transmitter P-SPMR20110EU

£2,158.00

27/05/2026 Stock expected soon

Add