Summary

Donut Lab is a Finnish/Estonian technology company that claims to have developed the world’s first solid-state battery in production vehicles, powering the 2026 Verge TS Pro motorcycle lineup. The company has attracted significant attention — and skepticism — for its headline claims of 400 Wh/kg energy density and 100,000-cycle life, which have not yet been verified by independent testing. Its corporate relationship with Verge Motorcycles makes it an unusual case: a battery startup with an in-house vehicle platform as its launch customer.

Key Facts

  • Headquarters: Estonia (with Finnish research roots)
  • Founded: Spun from research at Tampere University (Finland)
  • Manufacturing partner: Nordic Nano
  • Type: Private company / battery technology startup
  • Status: Claims production-stage; headline specs contested
  • Launch customer: Verge Motorcycles (same corporate family)
  • Cell chemistry basis: Amorphous titanium dioxide nanostructures; pseudocapacitance mechanism (proprietary)
  • Claimed energy density: 400 Wh/kg (~60% above best lithium-ion)
  • Claimed cycle life: 100,000 cycles (vs. 1,500–3,000 for lithium-ion)
  • Claimed charge time: 10–80% in 12 minutes; 10–50% in 5 minutes at pack level

What It Is / How It Works

Donut Lab’s technology reportedly originates from research into amorphous titanium dioxide nanostructures at Tampere University. The company describes a pseudocapacitance mechanism — rapid ion adhesion at the electrode surface rather than conventional intercalation — as responsible for its claimed fast-charge and long-cycle-life characteristics. Manufacturing is handled through Nordic Nano, a related entity.

The battery is designed as a drop-in pack for the Verge TS Pro electric motorcycle, with an 18 kWh base pack and a 30 kWh extended-range variant. The cell-to-pack design is air-cooled with no liquid thermal management, which the company attributes to the thermal stability of the solid electrolyte.

Industry reception has been divided. Battery experts have noted that the five independent test reports released by Donut Lab through VTT Technical Research Centre of Finland focus on thermal and abuse performance (e.g., maintaining 107% of nominal capacity after extended testing at 100°C) without directly measuring the two headline claims that matter most: the 400 Wh/kg energy density and the 100,000-cycle life. As of March 2026, neither claim has been verified by any published independent test.

The company’s position as both battery developer and motorcycle OEM (through its relationship with Verge Motorcycles) makes independent validation of production-volume claims more difficult to assess than for companies supplying external automotive customers.

Notable Developments

  • 2026-03-23: Fifth independent test report from VTT released; Electrek notes none of the five reports address energy density or cycle life. (Electrek)
  • 2026-03-16: Pack-level test result announced: 18 kWh pack sustains 100 kW (5C) charging for five minutes inside a Verge TS Pro motorcycle. VTT confirms cell thermal stability at 100°C. (Electrek)
  • 2026-01 (CES): Donut Lab announces “world’s first solid-state battery ready to power production vehicles,” claiming 400 Wh/kg, 100,000-cycle life, and five-minute charging. Immediate pushback from battery industry experts.
  • 2026 Q1: Verge Motorcycles begins delivering TS Pro Evolution with Donut Lab solid-state pack; 217-mile standard range, 370-mile extended-range option; 0–62 mph in 3.5 seconds; 186 miles of range added in 10 minutes.

Key People / Key Organizations

Marko Lehtimäki — CEO, Donut Lab; Founder

  • LinkedIn: linkedin.com/in/youngkasi
  • Role: CEO of Donut Lab; founding force behind both Donut Lab and Verge Motorcycles
  • Education: University of Helsinki (Computer Science)
  • Career (reverse-chronological):
    • Donut Lab (~2024–present): CEO and co-founder
    • Cova Power: Chairman of the Board (concurrent/advisory)
    • DeFinance Technologies: Board Member
    • Damon Motors (~2017–2024): Founder and CEO — led the Vancouver-based EV motorcycle startup for approximately 7 years before transitioning to focus on Verge/Donut Lab
    • Verge Motorcycles (2018–present): Founder; day-to-day CEO role transitioned to brother Tuomo Lehtimäki
  • Notes: Marko’s tenure at Damon — another EV motorcycle company — is his most notable prior role. Damon is a direct competitor to Verge in the premium electric motorcycle market, making Marko the only documented founder in this knowledge base who built competing companies in the same vehicle category before his current venture. ⚑ Overlap (corporate family): Marko controls both Donut Lab and Verge Motorcycles — these are affiliated entities, not arm’s-length customer/supplier.

Ville Piippo — Co-Founder and CTO, Donut Lab; also CTO, Verge Motorcycles

  • LinkedIn: linkedin.com/in/ville-piippo-b003877b
  • Role: Co-founder and CTO of Donut Lab; simultaneously serves as CTO of Verge Motorcycles (the launch customer); responsible for cell and pack design
  • Education: Aalto University (Finland) — product and industrial design background
  • Career (reverse-chronological):
    • Donut Lab / Verge Motorcycles (2018–present): Co-founder and CTO of both entities
    • Planmeca (prior): Industrial Design Intern — Finnish medical device and dental equipment manufacturer; Piippo’s pre-Verge background is in product/industrial design rather than battery chemistry or electrical engineering
  • Notes: Piippo’s industrial design background (rather than electrochemistry or electrical engineering) is unusual for a battery CTO; his primary contribution is likely the cell-to-pack integration and product design rather than the underlying cell chemistry, which originates from Tampere University.

Tuomo Lehtimäki — CEO, Verge Motorcycles

  • LinkedIn: linkedin.com/in/tuomo-lehtimäki-3462b825
  • Role: CEO of Verge Motorcycles; primary public spokesperson for vehicle-level announcements; brother of Marko Lehtimäki
  • Education: Oulun teknillinen oppilaitos (Mechatronics)
  • Career (reverse-chronological):
    • Verge Motorcycles (Jan 2019–present): CEO
    • RMV Tech Oy: Chairman of the Board (high-tech turbines and gas processing)
    • H.C. Petersen Finland Oy: CEO
    • Huutokaupat.com / Mezzoforte Oy: Key Account Manager
    • TR-Varaosat Oy: Entrepreneur (importing and sales)
  • Notes: Unlike his brother Marko, Tuomo has no prior EV or battery industry background — his career was in industrial equipment, auction platforms, and distribution before taking the CEO role at Verge Motorcycles in 2019. He provides the operational/commercial leadership while Marko and Ville Piippo drive the technology strategy.

Dr. Bela Bhuskute — Chief Scientist, Nordic Nano; Academic Origin of Cell Chemistry

  • LinkedIn: linkedin.com/in/belabhuskute
  • Role: Chief Scientist at Nordic Nano (since January 2025); the academic originator of the TiO₂-based nanostructure research that underlies Donut Lab’s cell chemistry
  • Education: Pune University, India (Master’s degree) → CSIR-National Chemical Laboratory, India (research) → Tampere University, Finland (PhD, Physics; defended May 28, 2025; dissertation: “TiO₂-based Photocatalysts for Solar Fuel Production”)
  • Career (reverse-chronological):
    • Nordic Nano (Jan 2025–present): Chief Scientist
    • Tampere University (Jan 2018–2025): Doctoral researcher, Faculty of Engineering and Natural Sciences — developed the TiO₂ nanostructure photocatalyst research that Nordic Nano licensed and adapted for battery applications
    • CSIR-National Chemical Laboratory, Pune, India: Research position (prior to doctoral studies)
  • Notes: Bhuskute is the critical technical link between the academic research and the commercial product. Her PhD work was in photocatalysis (solar fuel production using TiO₂), not battery technology directly — the adaptation of that TiO₂ nanostructure science to energy storage is the core of Donut Lab/Nordic Nano’s technical differentiation. Her doctoral defense occurred in May 2025, shortly after joining Nordic Nano full-time.

Key Organizations

  • Nordic Nano (Finland) — Manufacturing entity for Donut Lab cells; founded on Tampere University TiO₂ nanostructure research
  • VTT Technical Research Centre of Finland — Independent test body; has conducted five cell-level test series as of March 2026
  • Tampere University (Finland) — Academic origin of the underlying amorphous titanium dioxide nanostructure research

People — Last Reviewed: 2026-03-24

Supply Chain Position

Donut Lab operates at the Cell Manufacturing → Pack Assembly layers, with cell production handled by Nordic Nano (its manufacturing affiliate) and pack integration done for Verge Motorcycles (its launch customer). The cell chemistry uses amorphous titanium dioxide (TiO₂) nanostructures — no lithium sulfide precursor, no nickel or cobalt in the cathode, and no graphite anode. The primary upstream material requirement is titanium oxide (abundant, widely produced as a white pigment and industrial chemical with no critical supply concentration). Lithium metal or lithium-ion chemistry details at the anode level are not publicly disclosed. No documented shared upstream supplier overlaps with other battery companies in this knowledge base, reflecting the fundamentally different chemistry.

Claim Verification

Claim: 400 Wh/kg energy density

Status: Unverified

Supporting sources:

Refuting / questioning sources:

Summary: As of March 2026, no independent party has published a measurement of Donut Lab’s energy density. The claim is unverified and disputed by at least one senior industry figure.

Claim: 100,000-cycle life

Status: Unverified

Supporting sources:

Refuting / questioning sources:

Summary: Completely untested by any independent party as of March 2026.

Claim: 0–80% charge in 4.5 minutes (11C rate)

Status: Verified (cell level)

Supporting sources:

Refuting / questioning sources: None identified.

Summary: Fast-charging performance is the best-verified claim; independently confirmed at both cell and pack level.

Claim: Thermal stability at 100°C

Status: Verified (cell level)

Supporting sources:

Refuting / questioning sources: None identified.

Summary: High-temperature stability verified by VTT.

Sources