Reliable, Scalable Battery
Solutions for Space

Modular MA12x platforms deliver scalable energy storage and voltage stability across a wide range of smallsat missions — engineered with the same cell technology and processes that have powered 262+ satellites with zero failures.

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720 – 4,320 Wh
Scalable in a single battery
15.8 Grms
Random Vibration Qualified
>25,000 cycles
60% DOD LEO
<6 Months
Manufacturing Lead-time
SMALLSAT POWER

Reliable battery solutions for
smallsat and constellation programs

COTS batteries often fall short on life, consistency, and credible right-sizing data. Legacy systems can be oversized and heavy. GS Yuasa MA12x platforms deliver modular energy storage and voltage stability using the LSE12x cell — manufactured using the same processes and facility as GS Yuasa cells trusted on critical programs.

Built for real mission profiles

Stable voltage and consistent performance across a range of LEO duty cycles — including peak loads when your mission requires them.

Right-sized modular energy

Scalable from 720 Wh to 4,320 Wh in compact form factors — avoid the mass and cost of oversizing for your mission.

Accelerate your schedule

Qualification-by-similarity using the same cell designs and processes proven on critical programs.

MA12x PLATFORM

MA12x
Modular Battery
Platform

Configurable modular platforms from 720 Wh to 4,320 Wh in a single battery, built on the qualified LSE12x cell — a power-optimized 12 Ah electrode design. Designed for LEO smallsats and constellation programs across a wide range of mission duty cycles.

Request Configuration Analysis Download Qualification Summary (PDF)
MA12x modular battery configurations

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

MISSION FLEXIBILITY
Broad LEO duty-cycle support
Including peak demand when required
VOLTAGE STABILITY
Industry-leading low DCR
Minimal voltage drop under load
FAULT TOLERANCE
Fault detection and isolation capability
Mission-critical reliability
QUALIFICATION
Complete
Full electrical & environmental testing
THE DIFFERENTIATOR PROGRAMS ACTUALLY FEEL

Advanced Life & Performance Modeling

We don’t just sell cells. We help you right-size the entire energy storage solution using tools and data built on decades of real flight experience across this exact chemistry and form factor — now extended to the compact LSE12x cell and MA12x platforms for smallsats and constellations.

What our modeling delivers

  • → Accurate end-of-life performance predictions based on your specific LEO duty cycle, load profile, temperature profile, and DoD requirements
  • → Optimized cell selection and battery architecture — avoiding the mass and cost penalty of conservative worst-case oversizing (e.g. 450 Ah baseline reduced to 192 Ah nameplate for demanding GEO missions)
  • → Realistic margin management using the same methodology applied to 262+ satellites and the longest-running missions
  • → Consistent modeling approach from large GEO cells (LSE190, LSE160) down to LSE12x and MA12x — one data heritage across the entire family

Real mission example approach

We use detailed life and performance models based on predicted load profiles and heritage data from other LSE cell products. These models provide reference trade studies that can inform right-sizing decisions for mass, volume, and end-of-life margin. The modeling approach is validated against on-orbit data for other LSE cell products and should be considered as part of the overall right-sizing process for MA12x platforms. None of the MA12x configurations have flown yet.

Typical outputs we provide:
Capacity fade curves for your exact DoD & temperature
DCR at BOL and mission-life performance projections
Recommended cell type + parallel/series configuration
Margin vs. oversizing comparison with quantified mass savings

See a mission modeling example from the ESPAStar-HP mission in the section below. The model is validated against on-orbit data for other LSE cell products.

MISSION MODELING EXAMPLE

Example: ESPAStar-HP Mission Profile

The model (validated against on-orbit data for other LSE cell products) can be used to predict key metrics for right-sizing:
  • Capacity retention (fade) over mission life for the exact duty cycle
  • End of Discharge Voltage (EoDV) performance
  • Optimized battery configuration with quantified mass and volume savings

Full presentation (including methodology and additional validation cases) available in the Resources hub.

ESPAStar-HP Mission Model graph cropped from original SPW 2024 presentation

ESPAStar-HP 7-year GEO mission profile — GS Yuasa model (validated against on-orbit data for other LSE cell products) provides a reference for right-sizing to a 192 Ah (nameplate) LSE12x battery (16p8s configuration) vs. the spacecraft datasheet's 450 Ah baseline. Source: GS Yuasa SPW 2024.

THE FOUNDATION

LSE12x Cell

Every MA12x is built on the LSE12x: a power-optimized 12 Ah cell with Gen-4 LCO chemistry, designed for the duty cycles and environments of modern smallsat missions.

  • → Low internal resistance for stable voltage under load
  • → Suited to a range of LEO load profiles, including peak demand when required
  • → Fully space-qualified (LEO/MEO/GEO, unregulated bus)
LSE12x Cell Technical Specification Sheet (PDF)
LSE12x Cell
WHY LEADING PROGRAMS CHOOSE GS YUASA

Engineered for reliability
where failure is not an option.

Real MA12x Hardware

Real MA12x hardware during development & qualification

Compact, modular architecture

Mission-ready energy storage for a range of LEO duty cycles in a compact, scalable form factor.

Voltage stability under load

Minimal voltage drop under load for efficient EPS and dependable bus performance.

Proven fault tolerance

Architectures refined across 262+ satellites with zero cell failures.

Qualification-by-similarity

Leverage identical cell designs and processes from Cygnus and ISS to shorten your campaign.

Constellation economics

Predictable life, consistent performance, and volume manufacturing readiness.

US-based mission support

AS9100-certified integration, testing, and engineering in Georgia (flawless 2025 audit).

PROVEN WHERE IT MATTERS MOST

Flight Heritage That
De-Risks Your Mission

Northrop Grumman Cygnus

LSE cells in GS Yuasa batteries have powered multiple NASA CRS missions to the ISS. NG-20 helped push total flown energy past 5 MWh.

ISS Main Battery Replacement

Supplied reliable lithium-ion systems for NASA’s critical on-orbit upgrade.

262+ satellites • 5+ MWh • Zero cell failures

25+ years. 550+ million cell-hours. Across LEO, GEO, planetary, and human-rated programs. Same chemistry, design, and manufacturing processes used in MA12x today.

NEXT STEP

Ready to right-size your power system?

Speak with a power systems engineer for mission modeling, trade studies, and configuration support.

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Technical content subject to U.S. export controls (ITAR/EAR). Eligible recipients only.
Radiation and thermal performance data available to U.S. persons and eligible entities under NDA.
MA12x Qualification Package (PDF) LSE12x Cell Technical Specification Sheet (PDF) Technical Presentations Library