What Amprius does

Amprius Technologies, Inc. (NYSE: AMPX) designs and sells silicon anode lithium-ion battery cells built around a proprietary silicon nanowire anode technology and a four-layer cell structure with an elastic silicon-nanostructure interior. Its commercial portfolio is the SiCore platform (Power, Energy, and Balanced Energy/Power designs delivering up to 450 Wh/kg and 1,150 Wh/L commercially, with third-party validation of 500 Wh/kg and 1,300 Wh/L) and the higher-end SiMaxx pilot/R&D line, offered across multiple SA-series SKUs in cylindrical (e.g., 21700 SA110, SA112, SA117, SA124, SA128) and pouch (e.g., SA08, SA19, SA88, SA102, SA107, SA129) form factors. Key performance claims include up to 100% range improvement versus traditional Li-ion in unmanned aviation, 0–80% charging in as little as six minutes, 1,300 full-depth discharge cycles, and operating temperature range of −30°C to 60°C, with safety validated by the U.S. military nail penetration test and UN38.3 certification.

The company runs an asset-light, contract-manufacturing-led model. Silicon anode fabrication and MWh-scale cell assembly occur at the Fremont, California pilot line, while global scale production is delivered through the Korea Battery Alliance (three new NDAA-compliant contract manufacturers added December 2025), China-based partnerships, and a U.S. manufacturing partnership with Nanotech Energy established in February 2026 — together exceeding 2 GWh of aligned capacity. Revenue is generated primarily through direct enterprise sales of SiCore and SiMaxx cells to UAS manufacturers, HAPS operators (AALTO/Airbus, BAE Systems/Prismatic), eVTOL/air taxi developers, defense primes and agencies (L3Harris, U.S. Defense Innovation Unit), drone delivery platforms (Matternet, Nokia Drone Networks), and light-electric-vehicle customers, with a secondary channel through the tiered Amprius Pack Partner Program of certified integrators (Upgrade Energy, Titan Batteries, K-WonTS, Joules Miles, Sysgration). Pricing is quote-based and not publicly listed; revenue model is hardware sales supplemented by managed-services potential from the Fremont MWh facility. Full-year 2025 revenue was $73.0 million (+202% YoY), Q1 2026 revenue was $28.5 million (+153% YoY), and 2026 guidance is at least $130 million with positive non-GAAP Adjusted EBITDA of at least $4.0 million.

Amprius' primary customer segments are unmanned aviation (UAS/UAV), manned aviation (eVTOL/air taxis, HAPS), defense, light electric vehicles, full-size EVs, and AI/robotics platforms. The company has cultivated a near-pure-play position in high-energy-density silicon anode cells for weight- and range-constrained applications, with marquee customers including Nokia, Matternet, AALTO/Airbus, BAE/Prismatic, L3Harris, Nordic Wing, ESAero, Amazon Devices Climate Tech Accelerator, and an unnamed leading UAS manufacturer with $35 million in repeat orders. The customer base expanded from 159 in Q3 2025 to over 550 by year-end 2025. Strategic priorities reflected in 2025–2026 activity include scaling global contract manufacturing, securing NDAA-compliant domestic supply for U.S. defense, geographic expansion into South Korea (via Intralink and the Korea Battery Alliance) and Europe, and a CEO transition from founder Dr. Kang Sun to Tom Stepien effective January 1, 2026.

Name

Amprius

Legal name

Amprius Technologies, Inc.

Website

https://amprius.com

Company type

Public

Founded year

2008

Operating status

Operating

Headcount range

51–100 employees

Short description

Amprius Technologies designs and sells silicon anode lithium-ion battery cells (SiCore and SiMaxx platforms) for aerospace, defense, UAV/UAS, eVTOL, light EV, and robotics customers, using an asset-light contract manufacturing model with over 2 GWh of global capacity.

Ownership category

akta.pro rank

Product category

Advanced Lithium-Ion Battery Cells

NAICS

Battery Manufacturing (33591), Battery Manufacturing (335910), Semiconductor and Related Device Manufacturing (334413)

SIC

Semiconductors & Related Devices (3674)

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)

Keywords

• Silicon anode batteries
• Lithium-ion battery cells
• Electric aviation batteries
• Unmanned aerial systems
• Advanced energy storage

Headquarters

HQ city

Fremont

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Silicon Anode Battery Cell Sales (SiCore and SiMaxx): Primary revenue from sale of high-energy-density silicon anode lithium-ion battery cells to enterprise customers in aerospace, defense, UAV, eVTOL, and electric mobility markets. Cells sold through direct sales and via Pack Partner Program integrators. Large purchase orders from UAS manufacturers (e.g., $35M repeat order) and Nokia drone systems.
2. Contract Manufacturing Services Revenue: Amprius's silicon anode fabrication and MWh-scale Fremont pilot manufacturing capability supports internal production plus potential external contract manufacturing services through GWh-scale partnerships in Korea, China, and US-based Nanotech Energy partnership.
3. Capital Markets Financing Activities: Capital raised through equity offerings including a $100M at-the-market (ATM) equity offering (25.5M shares, $97.5M net proceeds) and up to $200M common stock to B. Riley Principal Capital II over 24 months. Not core revenue but supports scaling.

Go-to-market motion5 records

Distribution channels5 records

Marketing channels8 records

Core offering

Amprius designs and manufactures silicon-anode lithium-ion battery cells (SiCore and SiMaxx product platforms) for enterprise customers in unmanned aviation, manned aviation, defense, light electric vehicles, and AI/robotics. The cells deliver industry-leading energy density of up to 450 Wh/kg commercially (with third-party validation of 500 Wh/kg), enabled by proprietary silicon nanowire anode technology and a four-layer cell architecture.

Product overview

Amprius Technologies is a single-product-platform company built around its silicon anode lithium-ion battery technology, rather than a platform-plus-modules architecture. The core offering is the SiCore silicon anode battery platform — available in Power, Energy, and Balanced Energy/Power designs across cylindrical (e.g., SA110, SA112, SA117, SA124, SA128) and pouch (e.g., SA08, SA19, SA88, SA102, SA107, SA129) form factors — complemented by SiMaxx, the higher-end pilot/R&D silicon anode line produced at the Fremont facility. Individual SKUs within the SiCore family (High Energy, High Power, Balanced Energy & Power cells) are commercially available and configurable via the Product Selector on amprius.com. Distribution is supported by two adjacent partner networks: the Amprius Pack Partner Program, a certified integrator ecosystem (Upgrade Energy, Titan Batteries, K-WonTS, Joules Miles, Sysgration) that builds SiCore-powered battery packs, and the Korea Battery Alliance, a contract manufacturing network exceeding 2 GWh of aligned production capacity.

Differentiator

Problem solved

Functional benefit

Brands

• SiCore: Amprius' commercial silicon anode lithium-ion battery platform available in multiple cell formats (pouch and cylindrical), delivering up to 450 Wh/kg energy density.
• SiMaxx

Products and services

• SiCore Silicon Anode Battery Platform Flagship silicon anode lithium-ion battery platform with a four-layer cell structure and elastic silicon-nanostructure interior; delivers up to 450 Wh/kg energy density and 1,150 Wh/L volumetric density. Available in Power, Energy, and Balanced Energy/Power designs across cylindrical and pouch form factors. Includes SA-series SKUs (e.g., SA08, SA110, SA112, SA117, SA124, SA128).
• SiMaxx High Energy Density Battery Cells Ultra-high energy density silicon anode battery cells with third-party validated 500 Wh/kg and 1,300 Wh/L performance; produced at Amprius' Fremont pilot facility for R&D and customized solutions.
• SA128 SiCore 21700 Cylindrical Cell 21700-format silicon-anode cylindrical cell delivering 320 Wh/kg specific energy, produced in the United States via the Nanotech Energy partnership to serve defense and aerospace customers with NDAA-compliant domestic production.
• SiCore 520 Wh/kg Silicon-Anode Battery (CES 2026 Innovation Award) Award-winning next-generation silicon-anode battery delivering 520 Wh/kg, more than twice the energy density of many conventional lithium-ion batteries at the same weight.

Quantifiable outcome

• Up to 100% improvement in range compared to traditional lithium-ion batteries for unmanned aviation applications
• +6 more outcomes

Named customers11 records

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

17 partnerships are on record, tiered flagship, moderate and core.

• MatternetflagshipStrategic or Co-development Partner · 1 May 2026Strategic collaboration to advance autonomous aerial delivery using Amprius' high-energy density silicon anode cells. Amprius cells are already deployed in Matternet's FAA Type Certified M2 delivery drone, with over 60,000 commercial flights completed. The companies are co-developing battery solutions for Matternet's next-generation platform, targeting volume production readiness in early 2027.
• Baker & McKenzie LLPmoderateImplementation/ SI/ Consulting Partner · 1 May 2026Baker & McKenzie LLP acted as legal counsel for Amprius in the warrant exchange transaction.
• Deloitte & Touche LLPmoderateImplementation/ SI/ Consulting Partner · 1 April 2026Appointed Deloitte & Touche LLP as the company's new independent registered public accounting firm for the fiscal year ending December 31, 2026, effective immediately, replacing BDO USA, P.C.
• Nanotech EnergyflagshipOEM/ Whitelabel/ Licensing Partner · 1 February 2026Amprius partnered with Nanotech Energy to establish first U.S.-based manufacturing capability for silicon-anode battery cells (SA128 21700 cylindrical, 320 Wh/kg), expanding beyond Asian manufacturing footprint. The partnership increases Amprius' global capacity beyond 2 GWh and serves defense, aerospace, and critical markets with NDAA-compliant domestic production. Key customer L3Harris Technologies identified.
• Nokia (Nokia Drone Networks)flagshipStrategic or Co-development Partner · 1 December 2025Nokia selected Amprius' SiCore cells to power next-generation drone systems after extensive qualification and testing, marking Nokia's first deployment of silicon-anode battery technology in its drone fleet. Nokia Drone Networks combines 5G connectivity with drone-in-a-box solutions for industrial inspection, monitoring, public safety, and emergency response BVLOS missions. A Nokia drone was featured at Amprius' CES 2026 booth.
• Korea Battery Alliance (Three New Contract Manufacturers)coreStrategic or Co-development Partner · 1 December 2025Amprius expanded its Korea Battery Alliance by adding three new NDAA-compliant contract manufacturers at a launch event in Daejeon, South Korea. The expansion increases global contract manufacturing network capacity to over 2 GWh and provides direct access to Korea's advanced battery production ecosystem for serving defense, aerospace, and critical infrastructure segments.
• IntralinkcoreChannel Partner/ Reseller/ Distributor · 1 November 2025Amprius appointed Intralink to spearhead its expansion into South Korea's drone and robotics markets, targeting both the defense and commercial UAV sectors. Intralink operates a dedicated business development program in Seoul to identify opportunities and develop a sales pipeline with local partners.
• KULR Technology GroupmoderateStrategic or Co-development Partner · 1 November 2025Strategic partnership with KULR Technology Group for advanced aircraft battery systems. KULR plans to scale its KULR ONE Air platform, automate production, and expand operations in Texas in 2026, focusing on high-growth markets like autonomous systems and defense.
• ESAero (Empirical Systems Aerospace, Inc.)moderateStrategic or Co-development Partner · 1 October 2025ESAero selected Amprius' SiCore SA08 silicon-anode battery cells for UAVs supporting defense, security, and logistics applications. The cells significantly enhance flight time and payload capacity, aiding development and commercial deployment.
• Nordic WingmoderateStrategic or Co-development Partner · 1 September 2025Nordic Wing integrating Amprius SiCore silicon anode battery cells into the ASTERO ISR drone platform. Performance testing demonstrated a 90% boost in flight endurance for defense applications, with $10.5M Defense Innovation Unit award supporting the partnership.
• Upgrade EnergycoreChannel Partner/ Reseller/ DistributorU.S.-based certified integrator building SiCore-powered packs for consumer and commercial drones — optimized for extended flight times and reliable power delivery. Available direct online to consumers.
• Titan BatteriescoreChannel Partner/ Reseller/ DistributorCertified integrator providing 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.moderateChannel Partner/ Reseller/ DistributorCertified SiCore pack integrator building high-performance lithium battery solutions for demanding applications. South Korea-based company.
• Joules Miles Co., Ltd.moderateChannel Partner/ Reseller/ DistributorProfessional battery module manufacturer delivering reliable, high-end lithium solutions across automotive, medical, industrial, and consumer markets. Certified SiCore pack integrator.
• Sysgration Ltd.moderateOEM/ Whitelabel/ Licensing PartnerOEM/ODM battery pack integrator specializing in energy storage system design and manufacturing for automotive, industrial IoT, and mobility applications. Certified SiCore pack integrator.
• BAE Systems (Prismatic)flagshipStrategic or Co-development PartnerPrismatic, a BAE Systems company, partnered with Amprius to power the PHASA-35 High Altitude Pseudo Satellite (HAPS) for persistent, wide-area surveillance and communications from the stratosphere. CEO Dave Corfield of Prismatic endorses the collaboration.
• AALTO (Airbus)flagshipStrategic or Co-development PartnerAALTO (Airbus subsidiary) is a highly valued partner using Amprius' ultra-high-energy density batteries for the Zephyr HAPS platform, enabling improvements in nighttime operations and extending coverage latitude per CTO Pierre-Antoine Aubourg.

Scale indicators12 records

Recent moves11 records

Expansion highlights7 records

Direct peers

• Enovix Corporation: Publicly traded silicon-structure lithium-ion battery maker (NASDAQ: ENVX) pursuing 100% active silicon anodes for consumer electronics, IoT, and EV applications — directly comparable silicon-anode chemistry, cell form factors, and aerospace/IoT target markets.
• QuantumScape Corporation: Solid-state lithium-metal battery developer (NYSE: QS) targeting automotive and similar high-energy-density use cases. Comparable as a next-generation battery technology company pursuing premium energy-density markets where Amprius also plays.
• Solid Power: Sulfide-based solid-state battery developer (NASDAQ: SLDP) partnering with BMW and SK On; comparable as a next-gen battery technology public company pursuing automotive and defense aviation customers with a contract-manufacturing model.
• Sila Nanotechnologies: Private silicon-anode battery materials company backed by Daimler, BMW, and Microsoft. Directly comparable silicon-anode chemistry and product positioning, with auto and consumer-electronics customer overlap.
• Group14 Technologies: Private silicon battery materials (silicon-carbon composite SCC55™) supplier to cell makers including Amprius competitor Enovix. Closest direct peer in silicon-anode materials technology.

Broad incumbents

• Microvast Holdings: Vertically integrated commercial lithium-ion battery maker (NASDAQ: MVST) serving commercial vehicles, energy storage, and specialty mobility. Comparable as a publicly traded commercial-focused Li-ion cell/battery company targeting adjacent mobility end markets.
• FREYR Battery: Publicly traded lithium-ion battery cell developer (NYSE: FREY) building GWh-scale capacity in the U.S. and Europe with an asset-light / partnership-oriented approach. Comparable publicly traded scale-up Li-ion battery competitor pursuing similar GWh expansion.

Emerging players

• KULR Technology Group: Battery thermal management and high-energy cell/pack provider (NYSE: KULR) with a strategic partnership with Amprius on KULR ONE Air for autonomous systems and defense. Comparable as a niche U.S. public battery technology peer in defense/aerospace.
• SES AI Corporation: Hybrid lithium-metal battery developer (NYSE: SES) targeting EV and urban air mobility. Comparable publicly traded next-gen battery technology peer targeting eVTOL and high-energy-density mobility applications.
• Nanotech Energy: U.S.-based graphene-silicon anode battery manufacturer and current Amprius contract-manufacturing partner for the SA128 cell. Comparable emerging U.S. silicon-anode cell producer with overlap in defense and aerospace end markets.

Market position

Strengths1 record

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/AmpriusInc
• LinkedInlinkedin.com/company/amprius-inc
• Instagraminstagram.com/amprius

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries1 record

Funding overview

Funding rounds8 records

Investors12 records

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