As of February 23, 2026, there are still no independent test results from Finland’s VTT Technical Research Centre regarding the cycle life (Zyklenlebensdauer) of Donut Lab’s solid-state battery V1. The only VTT report published so far (CR 00092 26, dated February 9, 2026) focuses exclusively on fast-charging performance at 5C and 11C rates, along with thermal behavior during a single charge-discharge cycle on one cell. No cycling, long-term aging, or repeated charge-discharge testing is included.
Donut Lab continues to claim a design life of up to 100,000 full charge-discharge cycles with minimal capacity fade. This figure appears consistently across the company’s website (donutlab.com), CES 2026 presentations, YouTube announcement videos, and press materials. The company describes the battery as experiencing „minimal to zero degradation“ over its lifetime, enabling „practically unlimited cycles“ – equivalent to daily charging for around 270 years. It positions this as a major advantage over conventional lithium-ion batteries, which typically achieve 1,500–3,000 cycles before reaching 80 % capacity retention.
Website and Transparency Initiative
The dedicated platform idonutbelieve.com, launched to publish third-party VTT results and address skepticism, currently hosts only the fast-charge report (with video explanation). No additional reports on cycle life, calendar aging, energy density verification, or safety have been released as of today. Donut Lab announced on February 20, 2026, that further VTT-validated data – explicitly including cycle life and other key characteristics – would roll out „in the coming weeks“ via video series and full reports on the site. The first release occurred on February 23 at 2 pm CET, covering fast charging only.
Industry Context and Ongoing Skepticism
A 100,000-cycle rating would represent a leap of 30–60× over state-of-the-art lithium-ion cells and surpass most published solid-state prototypes (often 500–2,000 cycles in lab conditions). Experts note that validating such longevity requires accelerated testing under realistic conditions (e.g., 80–100 % depth of discharge, high C-rates, temperature cycling), which can take months or years even in accelerated protocols. Without disclosed test parameters – such as cycle depth, temperature, charge rate during cycling, or defined end-of-life criteria (e.g., 80 % retention) – the claim remains a manufacturer projection without external confirmation.
Social media and forum discussions (e.g., Reddit, X) reflect divided opinions: Supporters highlight the upcoming VTT series as potential proof, while critics label the longevity figure „ludicrous“ or compare it to unproven supercapacitor-like specs. Some point to Donut Lab’s integration into Verge Motorcycles (shipping Q1 2026) as a path to real-world fleet data.
Donut Lab-CTO Ville Piippo and CEO Marko Lehtimäki have repeatedly emphasized full transparency through VTT, stating that independent validation of all claims – including cycle life – is underway. The company has not yet provided preliminary internal cycle data or accelerated aging results.
Outlook
Real-world evidence could emerge soon from Verge TS Pro motorcycles equipped with the battery, potentially delivering early fleet cycling data by mid-2026. Until additional VTT reports appear on idonutbelieve.com, however, the 100,000-cycle figure remains an unverified Donut Lab assertion. The battery community continues to await concrete long-term test data to assess whether the fast-charging prowess demonstrated so far translates into the promised exceptional durability.
