Dr. William Willoughby reports

CENTURY LITHIUM ADVANCES DEMONSTRATION PLANT RELOCATION TO TONOPAH AND PROVIDES REAGENT COST STRUCTURE UPDATE

Century Lithium Corp. has provided an update on the relocation of its lithium extraction facility (demonstration plant) to the company's site in Tonopah, Nev., United States. Current market conditions also highlight the competitive advantage of the company's 100-per-cent-owned Angel Island lithium project in Esmeralda county, Nevada, and its integrated chlor-alkali process as global sulphur and sulphuric acid prices rise.

"During the last five years, Century Lithium developed an integrated process flow sheet that successfully produced battery-grade lithium carbonate from Angel Island claystone. The patent-pending process uses salt, rather than sulphur-derived reagents, which distinguishes Angel Island from spodumene and most sedimentary lithium projects globally," said Dr. Bill Willoughby, president and chief executive officer of Century Lithium. "Moving the demonstration plant to Tonopah lets us show the operating benefits of our chlor-alkali process at a moment when sulphur demand and related reagent costs are rising. Our process was designed for its compatibility with our Angel Island lithium deposit and regionally obtainable resources. As pressures on international supply chains increase, that advantage becomes increasingly meaningful for our shareholders and future customers."

Demonstration plant: progress and planned work at Tonopah

The demonstration plant operated at the company's Amargosa Valley facility for five years, producing battery-grade lithium carbonate and validating the integrated chlor-alkali flow sheet for Angel Island. Relocation to Tonopah is proceeding as planned. Equipment relocation, construction of a new process building and application for a Nevada water pollution control permit are all in progress, with commissioning targeted for the second half of 2026.

Upon completion, the company plans to conduct structured metallurgical testing per the recommendations of the 2026 feasibility study (described below), including full test runs on claystone zones 1 and 2. Bench-scale testing reported in the feasibility study indicates the deeper claystone performs as well as or better than the bulk samples of surface material used in earlier runs. The company also plans to evaluate improvements to leaching, direct lithium extraction (DLE), and lithium carbonate and hydroxide production.

The demonstration plant will also serve as a showcase of salt-based lithium extraction for government agencies, community stakeholders and potential financing partners. The company is pursuing federal critical minerals funding opportunities, including evaluation of the potential recovery of additional critical elements from Angel Island leach solutions as identified in the feasibility study.

Century Lithium's chlor-alkali process: salt as the foundation

Angel Island is built around a patent-pending chlor-alkali process in which hydrochloric acid (HCl) and sodium hydroxide (NaOH) are generated on site from sodium chloride (NaCl) and electricity. HCl leaches lithium from Angel Island claystone; NaOH provides pH control throughout leaching, filtration and DLE. Both reagents are continuously regenerated as co-products of the electrolytic cells, closing the loop and eliminating reliance on external acid supply chains.

The process does not use sulphuric acid and produces no sulphate byproducts. The primary inputs are NaCl and electricity, which are stable, domestically available and structurally uncorrelated to sulphur markets. As set out in the 2026 feasibility study, NaOH surplus to process requirements, which is expected to be significant, available for sale as an economic byproduct.

Global sulphur market conditions: why the process design matters now

Global sulphur markets are experiencing an extraordinary dislocation with direct consequences for agriculture and basic industries including metals. China's spot sulphur price of $950 (U.S.) per tonne represents a 283-per-cent increase from approximately $248 (U.S.) in January, 2025. In the United States, Tampa contract sulphur prices have surged from $69 (U.S.) per long ton at the start of 2024 to a projected $475 (U.S.) to $520 (U.S.) per long ton under Q1 2026 contracts, an increase of approximately 600 per cent in under two years. U.S. sulphuric acid prices have followed, rising from $85 (U.S.) per tonne in early 2024 to $146 (U.S.) per tonne by March, 2026.

2026 feasibility study

The 2026 feasibility study on Angel Island, prepared by Mineral Property Development LLC (MPDI), Global Resource Engineering Ltd. (GRE) and SRK Inc. in accordance with National Instrument 43-101, confirms that the chlor-alkali process's structural insulation from these supply chain forces underpins strong project economics with an after-tax NPV (net present value) of $4.01-billion (U.S.) and average operating costs of $4,389 (U.S.) of lithium carbonate.

The complete NI 43-101 technical report has been filed on SEDAR+. Investors are encouraged to read the technical report in its entirety for all material assumptions and qualifying factors.

Qualified person

The scientific and technical information contained in this news release has been reviewed and approved by Todd S. Fayram, MMSA-QP, chief technical officer of Century Lithium, a non-independent qualified person under NI 43-101.

About Century Lithium Corp.

Century Lithium is an advanced-stage lithium development company focused on its 100-per-cent-owned Angel Island lithium project in Esmeralda county, Nevada. Angel Island hosts one of the largest known sedimentary lithium deposits in the United States and is designed with an integrated, end-to-end process for the on-site production of battery-grade lithium carbonate to support the electric vehicle and battery storage markets.

The company has developed a patent-pending process that incorporates hydrochloric acid leaching, combined with direct lithium extraction, to produce battery-grade lithium carbonate. As part of the integrated chlor-alkali process, Angel Island is designed to produce sodium hydroxide as a co-product, with planned surplus sales expected to lower operating costs, reduce reliance on externally sourced reagents and minimize environmental impacts.

Century Lithium is currently advancing Angel Island through the permitting process.

Century Lithium trades on the TSX Venture Exchange under the symbol LCE, the OTCQX under the symbol CYDVF and the Frankfurt Stock Exchange under the symbol C1Z.

We seek Safe Harbor.