High-Reliability Space
Batteries for Every Scale of Mission

GS Yuasa has delivered industry-leading cumulative Li-ion flight heritage, with more than 5 MWh flown. We continue to power the most demanding large spacecraft programs with proven large-format cells while now bringing that same trusted electrochemistry to smallsats through the MA12x platform.

Explore Large Spacecraft Solutions See MA12x for Smallsats
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5+ MWh
Li-Ion in Space
262+
Satellites Powered
25+ Years
Supporting Space Missions
>20 Years
Longest Mission (Thaicom 4)
Zero
Cell Failures on Mission
ONE STANDARD. TWO MARKETS.

Heritage That Scales

GS Yuasa has built its reputation on delivering industry-leading reliability for the highest-stakes space missions. We continue to supply large-format cells for demanding high-reliability programs while now also offering the LSE12x cell and MA12x platform — extending that same proven electrochemistry and manufacturing standards to smallsats.

All spacecraft classes benefit from the same foundation: consistent chemistry, rigorous qualification, and decades of real flight data, along with advanced modeling tools that enable precise right-sizing for each mission.

LARGE SPACECRAFT
Proven on the Most Demanding Missions

Large-format LSE cells powering critical GEO, MEO, LEO, and human-rated programs for over 25 years.

Explore Large Spacecraft Solutions →
SMALLSATS
Extending Proven Performance

The LSE12x cell and MA12x platform bring the same trusted reliability to the growing smallsat market.

See MA12x for Smallsats →
LARGE SPACECRAFT & HIGH-RELIABILITY PROGRAMS

Trusted Where Reliability Is Non-Negotiable

GS Yuasa large-format LSE cells have powered flagship programs across GEO, MEO, LEO, and beyond — including multiple Cygnus CRS missions, ISS battery replacements, Van Allen Probes, and planetary defense programs.

Explore Large-Format LSE Cells
GS Yuasa large-format LSE cell line-up

Large-format LSE cells — over 5.0 MWh deployed in space with zero failures.

Consistent Chemistry Across 25+ Years

Same fundamental LCO/Graphite system refined across four generations.

Proven on Long-Duration Missions

Multiple programs operating successfully beyond 15–20 years on orbit with no cell failures.

Advanced Right-Sizing Support

Proprietary life and performance modeling tools help programs accurately size batteries without costly oversizing.

SMALLSAT POWER

Extending Proven Performance to Smallsats

The LSE12x cell delivers GS Yuasa’s proven Gen 4 LCO chemistry in a compact 12 Ah format optimized for high-pulse power and demanding smallsat duty cycles. The MA12x platform scales from 720 Wh to 4,320 Wh, delivering the reliability large programs have trusted for decades through rigorous manufacturing quality and consistency.

Explore the MA12x Platform →
MA12x modular battery configurations

MA12x platform — scalable from 720Wh to 4,320Wh in a single volume efficient package

High-Pulse Power Capability

Delivers exceptional discharge rates and voltage stability under the high-pulse, eccentric duty cycles typical of LEO smallsats.

Constellation Economics

Scalable production supports rapid delivery of the quantities needed for constellation programs on tight schedules.

Qualification Complete

Full qualification test data package available immediately. Accelerates program schedules by leveraging existing heritage data instead of starting from scratch.

WHY LEADING PROGRAMS CHOOSE GS YUASA

The GS Yuasa Difference

Real Flight Heritage

Not just qualified on paper. Proven across hundreds of thousands of cell-hours on actual missions, including multiple programs exceeding 15–20 years on orbit.

Purpose-Built for Space

Unlike many competitors that adapt commercial cells, GS Yuasa’s LSE family was designed from the ground up for the thermal, radiation, and long-life demands of space. This enables higher performance and mass efficiency without the compromises of terrestrial designs.

Chemistry Consistency

All GS Yuasa space cells are based on the LCO/Graphite Li-ion chemistry. Only four generations have been developed. After qualification, each generation’s chemistry is locked. GS Yuasa has held these configurations stable for more than 15 years.

Advanced Life & Performance Modeling

Our advanced modeling tools enable EPS engineers to forecast end-of-life performance and precisely size batteries for each mission. The result is lower mass and cost with greater confidence — the same capability used across both large spacecraft and smallsat programs. See mission modeling examples on the Large Spacecraft and Smallsats pages.

Configuration Control & Quality

Extremely rigorous supplier management, process control, and documentation. All space cells are built and tested on the same equipment using analogous processes in GS Yuasa’s Kyoto, Japan factory, certified to AS9100 and ISO 9001.

US-Based Mission Support

GS Yuasa Lithium Power is a US company based in Roswell, Georgia, providing engineering, integration, and testing support for North American programs. AS9100 and ISO 9001 certified.

NEXT STEP

Ready to power your mission?

Speak with a power systems engineer for mission modeling, trade studies, and configuration support — whether for large spacecraft or smallsat programs.

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