Military Battery Market

The global military battery market size was USD 2.38 Billion in 2025 and is expected to register a revenue CAGR of 9.0% during the forecast period. Market revenue growth is supported by the US Army Ground Vehicle Systems Center's programme to replace lead-acid 6T batteries, which power 80 to 90% of the Army's ground vehicle fleet, with a 6T lithium-ion battery, a fleet that fields approximately 800,000 6T batteries with roughly 250,000 purchased annually at a replacement, transportation, and installation cost exceeding USD 170 million per year. EaglePicher Technologies, which holds an approximately 85% share of the US missile battery market by its own account, secured an approximately USD 20 million US Air Force contract in March 2025 to produce silver-zinc guidance system batteries for Minuteman III intercontinental ballistic missiles, illustrating continued government demand for legacy thermal and reserve battery chemistries alongside newer lithium-ion vehicle and soldier power programmes. Every ground vehicle, soldier power system, and precision-guided munition requires a qualified battery matched to its specific voltage, discharge rate, and environmental survivability requirements, and a March 2025 executive order delegating Defense Production Act Section 303 authority to the Secretary of Defense is accelerating domestic critical mineral production intended to reduce foreign dependency across this entire battery supply chain. These are some of the key factors driving revenue growth of the market.

6T lithium-ion and lead-acid vehicle batteries, thermal reserve batteries for missiles and munitions, conformal wearable and soldier-worn lithium-ion batteries, and legacy nickel-based batteries are the commercial battery technologies that constitute the military battery market, supplied by a concentrated group of defense-focused battery manufacturers operating under military specification and National Defense Authorization Act sourcing requirements. For instance, in September 2025, Epsilor Electric Fuel, part of Michigan-based defense company Arotech, unveiled its COMBATT 6T lithium-ion battery for military vehicles, a 25.2-volt, 4,400-watt-hour battery the company states delivers six times the capacity of an equivalent lead-acid 6T battery, undergoing US Army certification testing to MIL-PRF-32565C standards covering bullet penetration and extreme temperature performance. Ground vehicle and missile battery programmes together account for the largest share of military battery demand, since both categories combine large fielded fleet volumes with recurring replacement cycles that do not depend on new platform procurement.

However, military battery qualification requires compliance with military specifications such as MIL-PRF-32565C for 6T batteries, covering bullet penetration, extreme temperature performance up to 500 degrees Celsius, and long cycle life, alongside National Defense Authorization Act sourcing rules that increasingly restrict final assembly and component sourcing from countries designated a Foreign Entity of Concern, a qualification and compliance burden that can take multiple years and that few commercial battery suppliers outside the established defense battery base are positioned to meet. Aggregate defense demand for any single battery type is difficult for suppliers to forecast because individual programmes each consume only a small portion of total demand, and the Department of Defense has itself identified a need for significant investment in battery and cell standardisation over the next five to ten years to reduce the resulting cost and availability risk. Legacy lead-acid and nickel-based battery replacement cycles remain slow and budget-constrained relative to newer lithium-ion and thermal battery programmes, limiting how quickly the overall fielded fleet can transition to higher-performance chemistries. These factors substantially limit military battery market growth over the forecast period.

Based on battery type, the global military battery market is segmented into lithium-ion 6T and portable batteries, thermal reserve batteries, legacy nickel-based batteries, and lead-acid batteries. The lithium-ion segment commands the largest revenue share because it spans both the US Army's highest-volume battery replacement programme, the 6T lithium-ion battery intended to replace lead-acid batteries across a fleet of approximately 800,000 fielded units, and the Conformal Wearable Battery programme supplying soldier-worn power, giving this segment the broadest combination of platform coverage and recurring replacement volume of any category in the market.

The thermal (reserve) battery segment is expected to register a rapid revenue growth rate in the global military battery market over the forecast period. Thermal reserve batteries remain the standard power source for precision-guided munitions and missile guidance systems because they offer a maintenance-free shelf life of up to 20 years followed by an instantaneous, high-power activation on demand, a combination that lithium-ion chemistry cannot replicate for expendable one-time-use weapons. EaglePicher Technologies' March 2025 contract to produce Minuteman III guidance system batteries, alongside sustained munitions production increases across precision-guided weapons programmes that consume thermal batteries at the point of activation, is driving demand growth that outpaces the more measured replacement cycle of vehicle and soldier power batteries.

• 01What is the global military battery market size in 2025 and what CAGR is expected during 2026-2035?
• 02What 6T lithium-ion battery replacement programme is the US Army's Ground Vehicle Systems Center finalizing, and how large is the fielded 6T battery fleet it would replace?
• 03What contract did EaglePicher Technologies secure in March 2025, and what share of the US missile battery market does the company hold?
• 04What COMBATT 6T lithium-ion battery did Epsilor Electric Fuel unveil in September 2025, and what capacity improvement does it claim over lead-acid?
• 05What Defense Logistics Agency award did Ultralife Corporation receive in September 2025?
• 06What executive order affecting military battery supply chains was issued in March 2025, and what authority did it delegate to the Secretary of Defense?
• 07What NDAA-compliant battery production pathway did Amprius Technologies confirm in February 2026?
• 08Why do thermal reserve batteries remain the standard power source for precision-guided munitions despite lithium-ion's dominance elsewhere in the market?
• 09Why does MIL-PRF-32565C certification create a multi-year qualification barrier for new entrants in the 6T battery segment?
• 10Why has the Department of Defense identified battery and cell standardisation as a five-to-ten-year investment priority?

This report covers the global military battery market across all major battery types, platform categories, applications, and geographic regions. Primary research combines panel conversations with industry experts and is cross-referenced against company financial disclosures, government agency reports, and defense procurement and regulatory publications. All market size figures use 2025 as the base year with a 2026-2035 forecast period.