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Adden Energy
A developer of stable, lithium-metal, solid-state batteries
About Adden Energy
Adden Energy is a technology company, spun out of Harvard University, that specializes in the development of advanced solid-state batteries for electric vehicles (EVs). The company is focused on creating a commercially viable solid-state battery that addresses key limitations of current lithium-ion technology.
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Adden Energy's core product is a dynamically-stable, lithium-metal battery that has demonstrated the ability to charge in as little as three minutes and endure over 10,000 cycles in a laboratory setting. This extended lifespan and rapid charging capability are designed to accelerate the adoption of EVs by making them more convenient and accessible to a wider range of consumers. The company is also working to improve the performance of its batteries in low-temperature conditions.
The company's business model appears to be centered on a business-to-business (B2B) approach, targeting original equipment manufacturers (OEMs) in the automotive sector. Adden Energy has established a pilot production line to produce sample cells for these potential clients. The company has secured significant funding to scale its research and development efforts and to advance the commercialization of its battery technology.
At a glance
- Status
- Operational
- Founded
- 2021
- Headquarters
- Waltham, United States
- Employees
- 23
- Open positions
- None listed
- Dealroom signal
- 87.7/100
- Sub-industry
- Energy Storage, Vehicle Production
- Sector
- Transportation, Lithium-Ion Batteries, Battery, Spinout, Sustainable Development Goals, EV Battery Production, Solid-State Battery, EV Battery, Climate Tech
- Technology
- Hardware, Deep Tech
- Business model
- Manufacturing
- Client focus
- b2b
Knowledge graph
More headlines
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| SERIES A✓Equity / VC | Oct 2024 | $15M | $60M | MassVentures · Primavera Capital Group · Rhapsody Venture Partners · At One Ventures | ↗ |
| SEED✓Equity / VC | Sep 2022 | $5.2M | $21M | MassVentures · Rhapsody Venture Partners · Primavera Capital Group | ↗ |
Growth signals
Latest recorded traffic for Adden Energy is 740 monthly website visits, down 70.4% over the last three months. Adden Energy's team grew 4.5% over the past year.
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Investments and acquisitions
Recent portfolio relationships for companies that also act as investors or acquirers.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Seed4 investors entered at this stage
Rhapsody Venture Partners
MassVentures
Primavera Capital Group
Harvard University
Series A1 investor entered at this stage
At One Ventures
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about Adden Energy on X, ranked by likes and reposts, corporate channels excluded.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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