Adden Energy: Funding, Investors & Team (Oct 2026)
Adden Energy is a company that creates durable, lithium-metal, solid-state batteries. These batteries have been shown to charge in as little as 3 minutes and maintain their capacity for over 10,000 cycles in small-scale testing. Adden Energy is committed to advancing technology to make electric vehicles more accessible and to help create a cleaner future.
Adden Energy has raised $31.9M across 2 funding rounds on record, the most recent an undisclosed round of $16.9M announced in Oct 2026.
That round is above the $15M median round size for Energy companies tracked on FundedIQ over the last two years.
Adden Energy Company Profile and Key Stats
Latest funding round on record: Oct 2026.
Adden Energy Funding Rounds
Adden Energy raised $15.0M in an undisclosed round announced in Sep 2024.
2.1 years later, an undisclosed round of $16.9M was announced in Oct 2026.
Adden Energy Investors
Adden Energy Founders and Leadership Team
Contact details for the Adden Energy team: 3 of 3 have an email address on file, 2 have a LinkedIn profile.
Start 14-day free trial →Adden Energy Funding Compared to Other Energy Startups
Adden Energy's latest round of $16.9M is above the median round in Energy. Medians cover the last 24 months of disclosed rounds.
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Adden Energy Funding FAQs
What does Adden Energy do?
Adden Energy is a company that creates durable, lithium-metal, solid-state batteries. These batteries have been shown to charge in as little as 3 minutes and maintain their capacity for over 10,000 cycles in small-scale testing. Adden Energy is committed to advancing technology to make electric vehicles more accessible and to help create a cleaner future.
How much funding has Adden Energy raised?
Adden Energy has raised $31.9M across 2 rounds on record. The most recent is an undisclosed round of $16.9M announced in Oct 2026.
When did Adden Energy last raise funding?
Adden Energy's most recent funding round on record is an undisclosed round of $16.9M, announced in Oct 2026.
Who has invested in Adden Energy?
Investors on record for Adden Energy include At One Ventures, Primavera Capital Group, Rhapsody Venture Partners, MassVentures.
Who founded Adden Energy?
FundedIQ lists William Fitzhugh (Co-Founder & CEO), Xin Li (Founder) at Adden Energy.
Where is Adden Energy headquartered?
Adden Energy is based in Waltham, Massachusetts, United States.
How many employees does Adden Energy have?
Adden Energy is in the 1-10 employee band.
When was Adden Energy founded?
Adden Energy was founded in 2021.
How does Adden Energy's funding compare to other Energy startups?
Adden Energy's latest round of $16.9M is above the $15M median round size for Energy companies on FundedIQ across 2,284 tracked companies over the last two years.
About FundedIQ's Adden Energy Funding Data
FundedIQ tracks announced funding rounds and refreshes this profile every week. Round dates, stages and amounts are normalised to a single format, converted to US dollars, and de-duplicated: two records of the same round announced days apart are merged, and two genuinely different rounds are kept apart on the amounts they disclose. Amounts shown are the disclosed figures only — a round announced without a number is listed and excluded from the total rather than estimated.
Employee counts are reported bands, not exact headcounts. Founder and executive names carry the job title on record. Anything we do not hold for Adden Energy is left off this page rather than filled in.
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