Four small rectangular electronic devices labeled "ISOX" are neatly arranged in a protective foam case, suggesting specialized equipment or sensors in a professional setting. The image is dimly lit.
Three small rectangular devices labeled "ESOX" are arranged inside a protective foam case. The image is dark, with the focus on the devices and the case interior.
Close-up of several rectangular electronic devices labeled "ESOX" with visible screws, resting in a foam-lined case. The image has a dark, teal-toned lighting.

ESOX Battery

The Defence Grade Solid State Battery. Mission Ready.

Solid-state battery technology designed for portable power, uncrewed and crewed defence platforms. Production-ready and field-deployable, built around energy density, safety, and integration demands of modern defence.

The ESOX Battery is One Part of an Integrated Architecture.

400

WH/KG

400Wh/kg
energy density

Up to 60% more usable energy than conventional lithium-ion, extending mission range and freeing capacity for critical payloads.

5

min

Full charge in under
5 minutes

Full charge and deep discharge supported as standard operating behaviour, keeping platforms mission-ready without restrictions or degradation.

100

°C

-30°C to +100°C
Full Mission Capability

Retaining more than 85% usable capacity from -30°C to +100°C. Engineered for the full spectrum of operational environments.

Powering the Platforms
Defining Modern Defence.

The ESOX Battery is designed to integrate across the full spectrum of modern defence platforms. From autonomous aerial systems to uncrewed maritime vessels, it delivers a decisive advantage in energy density, durability, and NATO allied supply chain certainty.

Uncrewed Aerial Systems

Tactical ISR drones, loitering munitions, and heavy-lift logistics UAVs all share one critical constraint; endurance. Every additional minute in the air is a tactical advantage. The ESOX Battery removes that constraint.

Uncrewed Ground Vehicles

Reconnaissance UGVs and combat support platforms operating in contested environments cannot afford to stop. Every recharge cycle is a vulnerability. The ESOX Battery eliminates that exposure.

Autonomous Submersible & Surface Vessels

Autonomous submersible and surface vessels (ASVs) operating in coastal surveillance, mine countermeasure, and long-endurance missions function far from maintenance support in the harshest maritime environments. Reliability is not optional. The ESOX Battery makes it absolute.

Energy Storage and Wearable Power

Infantry and forward operating bases depend on portable power across every critical system, from communication and navigation to medical equipment and powered exoskeletons. Every battery failure is a tactical vulnerability. The ESOX Battery delivers lightweight, wearable energy storage that keeps critical systems operational across extended missions.

Designed for Defence Programme Approval.

Military battery technologies are not evaluated on performance alone. Safety, supply chain resilience, and integration flexibility determine whether an energy system can be approved and deployed. The ESOX Battery was engineered with all three as founding requirements.

A close-up of a large, rectangular battery with metallic terminals on top, lit by blue-green lights, placed on a metal surface with other similar batteries in the background.
Close-up of several rectangular batteries with metal terminals on top, labeled “SOX,” placed in a row on a conveyor or metal surface under industrial lighting.
Close-up of several rectangular batteries with metal terminals on top, labeled “SOX,” placed in a row on a conveyor or metal surface under industrial lighting.

Portable Power

Deployable Energy
Storage. Combat Ready.

A rapidly deployable energy storage unit built for field operations, delivering high power on demand with a minimal tactical signature.

Rapid field deployment for forward operations

High power discharge on demand

Scalable capacity across mission requirements

Containerised enclosure for rapid mobilisation

High power discharge on demand

Containerised enclosure for rapid mobilisation

A close-up of a rectangular device labeled "ESOX Solid State Battery" resting on a metallic surface, with another similar device partially visible in the background. The scene is dimly lit with a blue tint.
Close-up of a rectangular ESOX solid state battery with a plug connector, illuminated in a dark, teal-lit environment, sitting on a flat surface with part of another device visible beside it.
A close-up of a rectangular solid-state battery labeled "ESOX Solid State Battery" with ports visible on its front, placed on a dark surface under teal lighting.

Safety Architecture

No Thermal Runaway. No Exceptions.

Solid-state nano battery architecture removes the key failure mechanisms present in conventional lithium-ion systems, improving platform survivability under damage.

No flammable liquid electrolytes

No thermal runaway chains

Designed for safe failure containment, zero user harm

Stable performance at sustained temperatures above 80°C

No thermal runaway chains

Designed for safe failure containment, zero user harm

A sleek rectangular battery labeled "ESO X | Battery" hovers above a metallic surface in a dimly lit, futuristic setting with blue-green lighting.
A metallic, rectangular battery with "SDX Battery" written on it floats in a dimly lit, futuristic setting with blue tones and blurred background details.
A sleek, metallic battery pack labeled "ESOX Battery" is displayed in a futuristic, teal-lit environment, positioned above parallel rails or conveyor belts.

Integration Flexibility

Integration Flexibility Without Compromise.

The ESOX Battery supports free-form system-level integration, allowing defence OEMs to design around mission requirements rather than battery constraints.

Configurable size, voltage, and geometry

Structural integration into frames or load-bearing elements

Modular architecture adaptable across diverse platform programmes

Non-traditional formats for ground, air, and maritime platforms

Configurable size, voltage, and geometry

Structural integration into frames or load-bearing elements

A close-up of a large, rectangular battery with metallic terminals on top, lit by blue-green lights, placed on a metal surface with other similar batteries in the background.
Close-up of several rectangular batteries with metal terminals on top, labeled “SOX,” placed in a row on a conveyor or metal surface under industrial lighting.
Three rectangular batteries with terminals on top sit on a conveyor belt under blue lighting in an industrial setting. The battery in the center has a label reading “ESOX.”.

Material Security

Material Security by Design.

The ESOX Battery is manufactured using abundant materials with global availability, eliminating the geopolitical and supply chain risks that compromise defence programmes.

No reliance on rare or geopolitically sensitive materials

Reduced exposure to supply disruption and cost volatility

Designed for scalable, multi-region production

Built from abundant, globally available materials

Designed for scalable, multi-region production

Built from abundant, globally available materials

The ESOX Battery is One Part of an Integrated Architecture.

Designed to work seamlessly with the Theron Motor and ESOX Platform, the ESOX Battery forms the energy foundation of a complete defence electrification system.

A futuristic, armored military vehicle with six wheels is illuminated by teal light, driving through a smoky, dark environment. Another vehicle is partially visible on the left side, obscured by shadow.
A large, armored, eight-wheeled military vehicle is parked on rough terrain at night, illuminated by faint green-blue lighting with mist or smoke in the air. Another smaller vehicle appears partially visible on the left.
An armored military vehicle with six large wheels is partially visible in dim, smoky lighting, suggesting a nighttime or low-visibility environment. The front of the vehicle is obscured by darkness.
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Integrated Platforms

Explore how ESOX Batteries integrate into complete defence electrification platforms.

Explore Integrated Platforms >

Explore >

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Close-up view of a rugged, black off-road vehicle tire with deep treads and a metallic wheel rim, shown in dim lighting.
Close-up of a rugged, black off-road vehicle tire with deep tread patterns, mounted on a dark metal wheel, on a rough surface with dim lighting.
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Motors

See how the ESOX Batteries and Motors work together as a unified power and propulsion system.

Expolore Motors >

Explore >

Three industrial battery units labeled "ESOXX SOLID STATE BATTERY" are positioned side by side in a dimly lit environment, with metallic connectors visible on top of each battery.
Three rectangular battery cells with labeled tops are arranged side by side on a metallic surface, illuminated by a blue-tinted light from above, creating a dramatic, industrial atmosphere.
A dark, moody image of a battery pack with two metal terminals on top, placed on a metallic surface, with two similar objects partially visible on either side.

Ready to Integrate the ESOX Battery into Your Programme?

Whether you are evaluating solid-state battery technology for a new platform or looking to upgrade an existing programme, our team is ready to support your next step.

Get in touch

Questions We Get Asked Most.

Technical and procurement details about the ESOX Battery.

What makes the ESOX Battery different from conventional lithium-ion batteries?

The ESOX Battery is a solid-state battery. It eliminates the flammable liquid electrolytes, thermal runaway chains, and metallic dendrites that define the failure modes of conventional lithium-ion systems. The result is a battery that delivers higher energy density, faster charging, longer cycle life, and superior safety under damage without the trade-offs that lithium-ion technology imposes on defence platforms.

Is the ESOX Battery production-ready for defence programmes?

Yes. The ESOX Battery is already being integrated into real defence platforms. Final defence testing is being completed with selected partners ahead of a production ramp-up in the second half of 2026, aligned with qualification and integration timelines.

What energy density does the ESOX Battery deliver?

The ESOX Battery delivers up to 400 Wh/kg at pack level, significantly higher than conventional lithium-ion alternatives. This enables lighter battery packs without compromising capacity, extending mission range and freeing payload capacity for critical mission equipment.

How does the ESOX Battery perform in extreme temperature environments?

The ESOX Battery has been validated for operation across extreme temperature ranges, maintaining full performance and safety at -30°C and up to 100°C with no signs of ignition or degradation. This resilience is critical for defence platforms operating across diverse and unpredictable environments from arctic to desert conditions.

What is the charge time and cycle life of the ESOX Battery?

The ESOX Battery supports full charge in as little as five minutes with full charge and deep discharge designed as standard operating behaviour. It is designed for up to 100,000 charge cycles with significantly slower degradation than conventional lithium-ion systems, reducing replacement frequency and lowering lifecycle cost across long-term defence programmes.

How does the ESOX Battery integrate into defence platform architectures?

The ESOX Battery supports free-form system-level integration with configurable size, voltage, and geometry. This allows defence OEMs to design power systems around mission requirements, payload placement, and protection needs rather than being constrained by fixed battery formats. It integrates seamlessly into the Theron Platform architecture alongside the Theron Motor.

What makes the ESOX Battery supply chain strategically secure?

The ESOX Battery is currently manufactured in Europe, backed by a NATO allied supply chain, using 100% abundant materials with no reliance on rare or geopolitically sensitive resources, with further global production sites planned. This eliminates the supply chain vulnerabilities that conventional battery technology creates and gives defence programmes the strategic independence that long-term procurement requires.

How do we begin evaluating the ESOX Battery for our programme?

The first step is a technical briefing with our engineering team. We will assess your platform requirements, identify the most suitable battery configuration, and outline the integration pathway for your specific programme. You can initiate this process by getting in touch directly or downloading our technical brief to begin your internal evaluation.

Talk to our team

Our engineers answer technical questions directly.

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