Century Lithium Achieves High Recovery of Rare Earths and Critical Elements from Primary Leach Solutions

VANCOUVER, BC – Dec. 2, 2025 – Century Lithium Corp. (TSXV: LCE) (OTCQX: CYDVF) (Frankfurt: C1Z) announced a breakthrough in its metallurgical testing program at the Angel Island lithium project in Nevada. Early results show that rare‑earth elements (REEs) can be extracted from primary lithium leach solutions with recovery rates exceeding 97 % while leaving lithium untouched.

“The REE recovery results validate our belief that the leach streams from Angel Island offer a valuable secondary revenue stream,” said Todd Fayram, senior vice‑president of metallurgy at Century Lithium. “A by‑product rich in critical minerals could strengthen the project’s economics and align us with U.S. and North‑American initiatives to secure domestic supply chains for strategic metals.”

Angel Island’s clay‑stone host contains measurable levels of dysprosium, gadolinium, neodymium, praseodymium, as well as higher concentrations of scandium, lanthanum, cerium and cesium. The ion‑exchange tests demonstrated selective capture of these REEs and critical metals without compromising lithium recovery, which proceeds through the company’s patented chloride‑leaching and direct lithium extraction (DLE) flowsheet.

Key take‑aways for investors and industry observers:

• High REE recovery efficiency – Greater than 97 % of identified REEs and critical metals were recovered in laboratory trials, meeting the thresholds for commercial viability.
• Full lithium selectivity – The ion‑exchange media showed no affinity for lithium, ensuring that downstream ultrafiltration, DLE and carbonate precipitation steps remain unaffected.
• Potential upside in project economics – Adding a REE by‑product could improve the net present value (NPV) and internal rate of return (IRR) of Angel Island, especially under scenarios of rising REE prices driven by electric‑vehicle (EV) motor demand and renewable‑energy technologies.
• Strategic alignment – The United States is intensifying efforts to develop domestic sources of critical minerals to reduce reliance on China. A dual‑output operation that delivers both battery‑grade lithium and REEs positions Century Lithium as a strategic supplier for both the EV market and defense‑related applications.

The company’s ongoing metallurgical program focuses on four pillars:

• Optimizing ion‑exchange performance and selectivity across a broader suite of REEs.
• Scaling downstream processing to concentrate and refine REEs into market‑ready products.
• Evaluating commercial pathways for a REE by‑product, including partnerships with specialty‑metal processors.
• Quantifying the economic contribution of REE recovery to the core lithium operation.

These milestones represent a critical step toward integrating REE extraction into the Angel Island value chain, potentially delivering a diversified suite of critical minerals from a single Nevada mining complex.

Qualified Person

Todd Fayram, MMSA‑QP and senior vice‑president of metallurgy at Century Lithium, has reviewed and approved the technical information in this release in accordance with NI 43‑101 standards.

About Century Lithium Corp.

Century Lithium Corp. is an advanced‑stage lithium developer focused on the 100 % owned Angel Island project in Esmeralda County, Nevada — one of the largest sedimentary lithium deposits in the United States. The company employs a patent‑pending chloride‑leaching process combined with direct lithium extraction to produce battery‑grade lithium carbonate at its demonstration plant in the Amargosa Valley.

Angel Island is positioned as a rare end‑to‑end project capable of delivering high‑purity lithium carbonate for the rapidly expanding EV and stationary‑storage markets. The project is in the permitting phase for a three‑phase, feasibility‑level production plan that targets an average of 34,000 tonnes per year of lithium carbonate over a projected 40‑year mine life.

Century Lithium’s shares trade on the TSX Venture Exchange (LCE), OTCQX (CYDVF) and the Frankfurt Stock Exchange (C1Z). For more information, visit the company’s website.

Forward‑Looking Statements

This release contains forward‑looking statements regarding the anticipated performance, economics and development timeline of the Angel Island project. These statements are based on current expectations and are subject to risks and uncertainties, including market price fluctuations for lithium and REEs, permitting outcomes, capital and operating cost estimates, and other factors that could cause actual results to differ materially from those expressed or implied. Readers are cautioned not to place undue reliance on these statements. The company does not undertake any obligation to update these forward‑looking statements, except as required by law.