Company lists · Data refreshed September 2026
Top 25 Battery pack assemblers based in the United States
RevenueBase identified 166 battery pack assemblers headquartered in the United States as of September 2026 and tracks 7,136 professional contacts across them, including 1,551 with verified work emails. San Diego is the largest hub.
This list covers battery pack assemblers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest battery pack assemblers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,198 contacts → | ||||
Partial evidence “Inventus Power is the leading provider of advanced battery and power systems for global OEMs.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 847 contacts → | ||||
Partial evidence “Electricity is the future of transportation, powered by battery cells that are designed and manufactured by some of the brightest, most innovative people in the world.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 578 contacts → | ||||
Strong evidence “National Power Corporation is a leading custom battery pack assembler servicing the needs of a Global OEM market.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 530 contacts → | ||||
Partial evidence “A123 Systems, LLC develops and manufactures advanced Nanophosphate® lithium iron phosphate batteries and energy storage systems that deliver high power, maximize usable energy…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 335 contacts → | ||||
Partial evidence “Octillion is a California-based Tier 1 supplier of innovative high-density battery systems and related technology focused on the electrification of major industries such as…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 139 contacts → | ||||
Indirect evidence “Founded in Stafford, Texas in 2006 as a research and technology driven company, Microvast Holdings, Inc.(Nasdaq: MVST) has evolved into a global leader in the design, development…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 131 contacts → | ||||
Partial evidence “Since 1996, iTECH is a designer, engineer, and manufacturer of batteries, chargers, and docking stations.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 115 contacts → | ||||
Indirect evidence “Epec Engineered Technologies is the ideal choice for an OEM seeking customized product solutions from a focused and agile partner having supported over customers across all…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 98 contacts → | ||||
Partial evidence “Amplify Cell Technologies is the first advanced commercial battery cell manufacturing plant for heavy-duty and medium-duty vehicles in the United States.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 82 contacts → | ||||
Strong evidence “Dragonfly Energy is a comprehensive lithium battery technology company, specializing in cell manufacturing, battery pack assembly, and full system integration.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 82 contacts → | ||||
Partial evidence “Flux Power designs and builds intelligent lithium-ion battery solutions and cloud-based energy management software for industrial fleets.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 79 contacts → | ||||
Strong evidence “Lithion is a vertically integrated manufacturer of cells, rechargeable and non-rechargeable battery packs and modules serving industrial, medical, robotic, military / defense and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 77 contacts → | ||||
Indirect evidence “For 55-years, Flight Systems Industrial Products (FSIP) has provided reliable, high quality products and services.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 77 contacts → | ||||
Indirect evidence “At Tecate Group, we pride ourselves on simplifying complex energy-storage requirements by combining our technical knowledge and design flexibility to deliver high-quality…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 75 contacts → | ||||
Strong evidence “Custom Power is a global supplier of premium COTS and custom-built battery packs for use in some of the harshest and most demanding environments.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 67 contacts → | ||||
Strong evidence “Aved Electronics | Custom Power & Interconnect Solutions – Fully Turnkey Aved Electronics is a U.S-based manufacturer specializing in custom battery packs, cable assemblies, and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 64 contacts → | ||||
Partial evidence “Valence’s safe, scalable, lithium modules are now produced solely by Lithion Battery as part of their growing portfolio of lithium solutions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 55 contacts → | ||||
Strong evidence “Nxu, Inc, formerly known as Atlis Motor Vehicles, is a US-owned technology company manufacturing innovative battery cells and battery packs, for use in advanced energy storage…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 50 contacts → | ||||
Partial evidence “Since 2015, Lithos has established itself as the global leader in high performance lithium-ion battery systems engineered for demanding environments.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 46 contacts → | ||||
Partial evidence “At EnPower, we are driven to solve today's energy challenges by building better batteries.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 45 contacts → | ||||
Indirect evidence “Inspired Energy is a privately-owned business located in the town of Newberry just west of Gainesville Florida, USA.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 45 contacts → | ||||
Indirect evidence “Tenergy Corporation is a total mobile power solution provider.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 43 contacts → | ||||
Indirect evidence “In 2019, Southwest Electronic Energy was acquired by Ultralife Corporation.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 38 contacts → | ||||
Strong evidence “Spiers New Technologies Inc (SNT) is the leading full service provider for advanced battery packs use in hybrid and electric vehicles.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 38 contacts → | ||||
Indirect evidence “Fluidic Energy is unique in many ways and arguably the most advanced new energy storage company in the world.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: battery pack assemblers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names battery pack assemblers.
- Partial evidence
- Its own public description names part of battery pack assemblers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name battery pack assemblers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 166 battery pack assemblers based in the United States
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Battery pack assemblers based in the United States at a glance
As of Sep 19, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 166 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among battery pack assemblers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “battery pack assemblers”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names battery pack assemblers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among battery pack assemblers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 1,551 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names battery pack assemblers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many battery pack assemblers are there based in the United States?
RevenueBase identified 166 battery pack assemblers headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Inventus Power, headquartered in Woodridge, tops this list with the largest team on record.
Which city has the most battery pack assemblers?
San Diego leads with 5 headquartered companies, followed by San Jose (4) and Fremont (3).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,551 verified decision-maker contacts tracked across these 166 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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