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

Metallurgy & Processing

TSXV: LCE | OTCQX: CYDVF

Suite 1030 – 505 Burrard Street, Vancouver, BC V7X 1M5 Canada

NEWS RELEASE

CENTURY LITHIUM ACHIEVES HIGH RECOVERY OF RARE EARTH AND CRITICAL

ELEMENTS FROM PRIMARY LEACH SOLUTIONS

December 2, 2025 – Vancouver, Canada – Century Lithium Corp. (TSXV: LCE) (OTCQX: CYDVF) (Frankfurt:

C1Z) (“Century Lithium” or “the Company”) is pleased to report positive results from its ongoing test work

on the recovery of rare earth elements (“REEs”) from primary lithium leach solutions generated from its

100%-owned Angel Island lithium project in Nevada, USA. The initial testing indicates that high REE

recoveries can be achieved without impacting lithium recovery in Century Lithium’s extraction process.

“The REE recovery results validate our belief that Century Lithium’s leach solutions offer meaningful

secondary-value opportunities,” said Todd Fayram, Century Lithium’s Senior Vice President, Metallurgy.

“Producing a secondary REE-rich product has the potential to strengthen Angel Island’s economics and

align the Company with broader government and industry initiatives supporting secure North American

critical-minerals supply chains.”

Century Lithium previously confirmed that the leach solutions produced from Angel Island claystone

contain notable concentrations of REEs, including dysprosium, gadolinium, neodymium, and

praseodymium, as well as higher concentrations of the critical metals scandium, lanthanum, and cerium.

Cesium is also present.

Ion-exchange test work achieved greater than 97% recovery of the identified REEs and critical metals,

excluding cesium, while maintaining complete selectivity against lithium. This selectivity is essential for

downstream lithium recovery through the Company’s process flowsheet, which includes ultrafiltration,

direct lithium extraction (“DLE”) and subsequent steps to produce high-purity lithium carbonate.

The Company’s metallurgical program at Angel Island continues to focus on the following:

• Optimizing ion-exchange performance and selectivity

• Advancing downstream processing flowsheets for REE concentration and refinement

• Evaluating market pathways for a commercial REE by-product

• Assessing the economic contribution of REEs to primary lithium production

These results represent a significant technical milestone, demonstrating that REE extraction and recovery

can be implemented without affecting the Company’s core lithium recovery process. Century Lithium

believes these advancements position the Company to potentially supply both lithium and REEs to North

American critical minerals markets, supporting supply-chain resilience and enhancing long-term project

value for Angel Island.

Qualified Person

Todd Fayram, MMSA-QP and Senior Vice President, Metallurgy of Century Lithium is the qualified person

as defined by National Instrument 43-101 and has approved the technical information in this release.

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ABOUT CENTURY LITHIUM CORP.

Century Lithium Corp. is an advanced-stage lithium company, focused on developing its 100%-owned

lithium project Angel Island in Esmeralda County, Nevada, which hosts one of the largest sedimentary

lithium deposits in the United States. The Company has utilized its patent-pending process for chloride

leaching combined with direct lithium extraction to make battery-grade lithium carbonate product

samples from Angel Island’s lithium-bearing claystone at its Demonstration Plant in Amargosa Valley,

Nevada.

Angel Island is one of the few advanced lithium projects in development in the United States to provide an

end-to-end process to produce battery-grade lithium carbonate for the growing electric vehicle and

battery storage market. Angel Island is currently in the permitting stage for a three-phase feasibility-level

production plan, expected to yield an estimated life-of-mine average of 34,000 tonnes per year of lithium

carbonate over a 40-year mine-life.

Century Lithium trades on both the TSX Venture Exchange under the symbol “LCE” and the OTCQX under

the symbol “CYDVF”, and on the Frankfurt Stock Exchange under the symbol “C1Z”.

To learn more, please visit centurylithium.com.

ON BEHALF OF CENTURY LITHIUM CORP.

WILLIAM WILLOUGHBY, PhD., PE

President & Chief Executive Officer

For further information, please contact:

Spiros Cacos | Vice President, Investor Relations

Direct: +1 604 764 1851

Toll Free: 1 800 567 8181

[email protected]

centurylithium.com

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER ACCEPTS

RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THE CONTENT OF THIS NEWS RELEASE.

Cautionary Note Regarding Forward-Looking Statements

This release contains certain forward-looking statements within the meaning of applicable Canadian

securities legislation. In certain cases, forward-looking statements can be identified by the use of words

such as "plans", "expects" or "does not anticipate", or "believes", or variations of such words and phrases

or statements that certain actions, events or results "may", "could", "would", "might" or "will be taken",

"occur" or "be achieved" and similar expressions suggesting future outcomes or statements regarding an

outlook.

Forward-looking statements relate to any matters that are not historical facts and statements of our beliefs,

intentions and expectations about developments, results and events which will or may occur in the future,

without limitation, statements with respect to the potential development and value of the Project and

benefits associated therewith, statements with respect to the expected project economics for the Project,

such as estimates of life of mine, lithium prices, production and recoveries, capital and operating costs, IRR,

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NPV and cash flows, any projections outlined in the Feasibility Study in respect of the Project, the permitting

status of the Project and the Company’s future development plans.

These and other forward-looking statements and information are subject to various known and unknown

risks and uncertainties, many of which are beyond the ability of the Company to control or predict, that may

cause their actual results, performance or achievements to be materially different from those expressed or

implied thereby, and are developed based on assumptions about such risks, uncertainties and other factors

set out herein. These risks include those described under the heading "Risk Factors" in the Company’s most

recent annual information form and its other public filings, copies of which can be under the Company’s

profile at www.sedarplus.com. The Company expressly disclaims any obligation to update-forward-looking

information except as required by applicable law. No forward-looking statement can be guaranteed, and

actual future results may vary materially. Accordingly, readers are advised not to place reliance on forward-

looking statements or information. Furthermore, Mineral Resources that are not Mineral Reserves do not

have demonstrated economic viability.