What Amprius Technologies does

Amprius Technologies, Inc. (NYSE: AMPX), founded in 2008 and headquartered in Fremont, California, manufactures and supplies high-energy-density lithium-ion batteries built on proprietary silicon anode technology. The company's core platforms—SiMaxx (premium, up to 450 Wh/kg commercial / 500 Wh/kg third-party validated) and SiCore (standard, with Power, Energy, and Balanced variants delivering 346-400 Wh/kg)—use a four-layer elastic silicon-nanostructure architecture that addresses historical silicon expansion problems while enabling up to 1,300 full-depth-of-discharge cycles, 0-80% charging in six minutes, and operation from -30°C to 60°C. The product portfolio encompasses 25+ specific cell models across pouch and cylindrical (21700) form factors, including NDAA-compliant variants manufactured under the Nanotech Energy partnership for U.S. defense customers.

Amprius generates revenue primarily through direct sales of battery cells to defense agencies, UAS manufacturers, aviation companies, and electric mobility manufacturers, complemented by a certified Pack Partner Program (Upgrade Energy, Titan Batteries, K-WonTS, Joules Miles, Sysgration) that distributes cells to downstream integrators serving drones, EVs, and robotics. Manufacturing combines an MWh-scale Fremont pilot facility with GWh-scale contract manufacturing partnerships in China, South Korea, and domestically via Nanotech Energy, providing over 2.0 GWh of global capacity. Customer end-markets span unmanned aviation (UAS, HAPS), manned aviation/eVTOL, light electric vehicles (e-bikes, scooters), defense, and AI/robotics, with key relationships including Nokia Drone Networks, Matternet, Prismatic (PHASA-35 HAPS), AALTO (Zephyr HAPS), and unnamed leading UAS and Chinese electric mobility customers. The company reports AS9100:2016 and ISO 9001:2015 certifications as critical qualifications for aerospace and defense supply chains.

Financially, Amprius grew full-year 2025 revenue 202% to $73.0 million from $24.2 million in 2024, posted Q1 2026 revenue of $28.5 million (+153% YoY), and guided to at least $130 million for full-year 2026. The company secured approximately $500 million in new U.S. defense orders in Q1 2026 and added over 100 new customers in Q4 2025. Operating structure includes an IPO on NYSE in 2022, the 2022 spin-off of its former consumer power-bank subsidiary (Apex Wuxi), a January 2026 leadership transition (Tom Stepien to CEO, Ricardo Rodriguez to CFO), and the February 2026 termination of a 774,155 sq ft Brighton, Colorado lease at a $20 million fee as it consolidated manufacturing strategy around GWh-scale contract partners.

Name

Amprius Technologies

Legal name

Amprius Technologies, Inc.

Website

https://amprius.com

Company type

Public

Founded year

2008

Operating status

Operating

Headcount range

101–250 employees

Short description

Amprius Technologies (NYSE: AMPX) manufactures high-energy-density silicon anode lithium-ion batteries (SiCore and SiMaxx platforms, up to 450 Wh/kg) for unmanned aviation, manned aviation, defense, light electric vehicles, and AI/robotics customers, selling direct and via certified pack integrator partners globally.

Ownership category

akta.pro rank

Product category

Advanced Battery Cells

NAICS

Battery Manufacturing (33591)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Battery Cells (Li-ion, LFP, Sodium-ion, Lead-acid, NiMH) (IMAGAHAA)

akta.pro secondary industries

Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB), Battery Cell Manufacturing (EV) (IMACACAB), E-Mobility Batteries & Swappable Packs (Consumer) (CRACASAI)

Keywords

• Silicon anode batteries
• Lithium-ion battery cells
• Aviation battery systems
• Defense battery solutions
• Electric mobility batteries

Headquarters

HQ city

Fremont

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Technology or R&D, Personnel, Infrastructure, Marketing or Sales

Revenue model

1. Battery Cell Sales: Amprius generates revenue primarily from the sale of silicon anode lithium-ion battery cells, including SiCore and SiMaxx product lines. Revenue is derived from direct sales to defense customers, UAS manufacturers, aviation companies, and electric mobility manufacturers, as well as through distribution to pack integrators.
2. Pack Partner Program: Revenue flows through certified pack integrator partners (Upgrade Energy, Titan Batteries, K-WonTS, Joules Miles, Sysgration) who purchase Amprius cells to build battery packs for end customers.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels5 records

Core offering

Amprius Technologies designs, manufactures, and sells high-energy-density silicon anode lithium-ion battery cells under its proprietary SiCore and SiMaxx platforms. The cells are sold in pouch and cylindrical (21700) form factors with Power, Energy, and Balanced design variants and are integrated directly by defense agencies, UAS manufacturers, aviation companies, electric mobility OEMs, and certified pack integrator partners serving drones, eVTOL aircraft, light electric vehicles, passenger EVs, and robotics applications.

Product overview

Amprius Technologies manufactures high-energy-density lithium-ion batteries using proprietary silicon anode technology. The company offers two main product platforms: SiCore (standard silicon anode platform available in pouch and cylindrical formats with Power, Energy, and Balanced design variants delivering 346-400 Wh/kg) and SiMaxx (ultra-high-energy variant delivering up to 450 Wh/kg and 1,150 Wh/L, third-party validated to 500 Wh/kg). The product portfolio includes 25+ specific cell models across pouch (SA-series) and cylindrical (SA1xx series) form factors, categorized as High Energy, High Power, or Balanced Energy & Power types. Manufacturing is headquartered in Fremont, California with GWh-scale contract manufacturing partnerships in China, South Korea, and recently Nanotech Energy for US-based NDAA-compliant production.

Differentiator

Problem solved

Functional benefit

Brands

• SiCore: Silicon anode battery platform delivering high energy density and long cycle life, available in commercial volumes with shorter lead times. Features a four-layer structure with elastic silicon-nanostructure interior.
• SiMaxx

Products and services

• SiCore Silicon Anode Battery Platform SiCore is Amprius's commercial-volume silicon anode lithium-ion battery cell platform featuring a four-layer structure with elastic silicon-nanostructure interior that alleviates expansion stress and reduces surface side reactions. Available in pouch and cylindrical formats with three design variants — Power Design (370 Wh/kg, 10C discharge), Energy Design (400 Wh/kg, 1C discharge), and Balanced Energy/Power Design (346 Wh/kg, 3C discharge) — SiCore targets defense, aviation, electric mobility, and robotics customers needing high energy density with shorter lead times and full encapsulation. The platform encompasses SA-series pouch and cylindrical SKUs optimized for varying power and energy trade-offs.
• SiMaxx Premium Silicon Anode Battery Platform SiMaxx is Amprius's premium ultra-high-energy silicon anode lithium-ion battery platform delivering up to 450 Wh/kg and 1,150 Wh/L, with third-party validation confirming 500 Wh/kg and 1,300 Wh/L capability. Positioned as the higher-energy variant compared to SiCore, SiMaxx targets applications where maximum runtime is the priority, including advanced aviation, HAPS, and other high-endurance use cases.

Quantifiable outcome

• Up to 100% improvement in range compared to traditional lithium-ion batteries
• +4 more outcomes

Named customers7 records

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Ten partnerships are on record, tiered core, preferred, certified and strategic.

• MatternetcoreStrategic or Co-development Partner · 19 May 2026Strategic collaboration to advance drone delivery battery performance using Amprius' high-energy density silicon anode cells. Amprius cells are deployed in Matternet's M2 aircraft, with partnership extending to optimize battery systems for Matternet's next-generation platform. Volume production targeted for early 2027. Partnership aims to translate battery performance gains into expanded network coverage, increased fleet utilization, and reduced cost per delivery.
• Nanotech EnergycoreTechnology or Integration · 3 February 2026Manufacturing partnership to establish domestic U.S. production pathway for silicon-anode battery cells. Aligns with National Defense Authorization Act requirements and supports key defense customers including L3Harris. Expands global manufacturing capacity beyond 2.0 GWh. Companies refined the design of the SA128 silicon-anode cell (21700 format, 6.8 Ah capacity, 320 Wh/kg energy density) for commercial, industrial, and defense sectors.
• Nokia Drone NetworkscoreStrategic or Co-development Partner · 2 December 2025Nokia selected Amprius' SiCore cells to power next-generation drone systems following extensive qualification and testing. Amprius batteries demonstrated endurance, power delivery, and safety performance for Nokia's drone-in-a-box solution. Supports advanced payloads including LiDAR, thermal imaging, and 5G communication modules without compromising endurance.
• Upgrade EnergypreferredChannel Partner/ Reseller/ DistributorU.S.-based integrator building SiCore-powered packs for consumer and commercial drones, optimized for extended flight times and reliable power delivery. Available direct online.
• Titan BatteriespreferredChannel Partner/ Reseller/ DistributorCertified pack integrator building lightweight, energy-dense SiCore-powered packs for the consumer drone market, delivering longer flight times and consistent power across diverse platforms and applications.
• K-WonTS Co., Ltd.certifiedChannel Partner/ Reseller/ DistributorCertified SiCore pack integrator building high-performance lithium battery solutions for demanding applications.
• Joules Miles Co., Ltd.certifiedChannel Partner/ Reseller/ DistributorProfessional battery module manufacturer delivering reliable, high-end lithium solutions across automotive, medical, industrial, and consumer markets.
• Sysgration Ltd.certifiedChannel Partner/ Reseller/ DistributorOEM/ODM battery pack integrator specializing in energy storage system design and manufacturing for automotive, industrial IoT, and mobility applications.
• KULR Technology GroupstrategicStrategic or Co-development PartnerStrategic partnership for advanced aircraft battery systems, combining KULR's thermal management expertise with Amprius' high-energy density silicon anode batteries.
• South Korea Manufacturing PartnercoreTechnology or IntegrationStrategic manufacturing agreement in South Korea supporting global demand across aerospace, defense, and electric mobility markets. Part of secured 1.8+ GWh contract manufacturing capacity.

Scale indicators14 records

Recent moves9 records

Expansion highlights7 records

Direct peers

• Group14 Technologies: Producer of silicon battery anode materials (SCC55™) used in Li-ion cells, addressing the same high-energy-density applications as Amprius. A direct upstream materials competitor whose technology is aimed at automotive, consumer electronics, and aviation customers.
• Enovix Corporation: Silicon-anode Li-ion battery manufacturer using a 3D cell architecture to achieve high energy density, directly comparable to Amprius's silicon-anode approach. Both serve consumer electronics and EV markets with premium energy-density cells.
• Sila Nanotechnologies: Developer of silicon-anode battery materials used in Li-ion cells, competing head-to-head with Amprius's SiCore/SiMaxx platforms. Both target high-energy-density applications in consumer electronics, EVs, and aviation with comparable silicon-anode technology.
• Microvast Holdings: Vertical Li-ion battery manufacturer producing cells, modules, and packs for commercial vehicles, specialty EVs, and energy storage — overlapping with Amprius's light EV and commercial/industrial battery segments.

Others

• KULR Technology Group: Thermal management and battery safety solutions provider that has a strategic partnership with Amprius for advanced aircraft battery systems. Adjacent ecosystem participant rather than a direct cell competitor, but closely tied to Amprius's aviation product roadmap.

Broad incumbents

• CATL (Contemporary Amperex Technology): World's largest Li-ion battery manufacturer serving EVs, energy storage, and industrial customers. While not focused on silicon anode, CATL's scale and pricing power set the competitive baseline for energy density and cost in the broader Li-ion market Amprius addresses.
• EnerSys: Industrial battery manufacturer covering motive power, reserve power, and aerospace/defense cells. A broad incumbent competing with Amprius for defense and aviation battery programs with a more established, lower-energy-density product portfolio.
• Panasonic Energy: Tier-1 Li-ion battery manufacturer and Tesla Gigafactory partner with extensive automotive, consumer, and industrial battery offerings. Sets the incumbency benchmark for cell quality, scale, and qualification depth that Amprius must meet in defense and EV programs.
• LG Energy Solution: Major global Li-ion battery manufacturer supplying automotive, energy storage, and consumer electronics. A broad incumbent whose products and roadmap influence the premium-energy-density segment where Amprius competes.

Emerging players

• Solid Power: Developer of solid-state battery technology for EVs and aerospace. Competes with Amprius for next-generation aviation and EV battery programs, but uses a different (solid-state) chemistry rather than silicon-anode Li-ion.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/ampriustechnologies
• Xx.com/ampriusinc
• Facebookfacebook.com/Amprius-Technologies-61556339931840

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Amprius Technologies