Mr. Stephen Rentschler reports

ADDITIONAL CRITICAL MINERAL POTENTIAL CONFIRMED WITH 95.9% CESIUM AND 86.9% RUBIDIUM EXTRACTION AT BONNIE CLAIRE LITHIUM PROJECT

Nevada Lithium Resources Inc. has provided a technical update on its 2026 metallurgical program at its 100-per-cent-owned Bonnie Claire lithium project, located in Nye county, Nevada.

Nevada Lithium's chief executive officer, Stephen Rentschler, comments:

"I am pleased to announce that the opportunity to produce additional critical minerals at Bonnie Claire continues to grow. Recently completed lab work has confirmed very high cesium and rubidium extraction rates from pregnant leach solution (PLS). This PLS was generated by the recovery flow sheet developed for the Bonnie Claire preliminary economic assessment, as announced by company news release, dated Aug. 6, 2025.

"Following the successful leaching of cesium and rubidium, an initial test of two ion exchange resins resulted in a successful proof of concept recovery method. The company is confident that the ion exchange recovery method can be improved upon with trials of additional resin chemistry and further flow sheet development. A follow-on work program to optimize cesium and rubidium recovery is currently being evaluated by Nevada Lithium's technical team.

"Cesium and rubidium grades are strongly correlated to high-grade lithium and boron in the lower mineralized zone at Bonnie Claire (see company news release dated Sept. 17, 2025). Therefore, there is no expectation of increased mining costs to deliver these additional critical minerals to the processing plant for recovery. The results of further metallurgical testing, and the capital requirements required for commercial production of cesium and rubidium, will be evaluated as part of the company's upcoming preliminary feasibility study.

"Using the knowledge gained from this successful cesium and rubidium analysis, a work program to determine the potential for rare-earth elements recovery (REE) at Bonnie Claire is currently under design. We remain focused on creating additional shareholder value in the development of the Bonnie Claire lithium project, located in one of the world's premier mining jurisdictions, Nevada, USA."

Highlights

• Successful extraction of critical minerals: 95.9-per-cent cesium (Cs) and 86.9-per-cent rubidium (Rb) recovery from high-grade composite sample.
• Current flowsheet confirmed: Cs and Rb are leachable from the lithium clay ore under the existing baseline conditions; 700 kilograms per tonne sulphuric acid addition, a leaching temperature of 90 degrees Celsius and a residence time of four hours.
• Counter-current leach applicability: The counter-current leach configuration adopted in the 2025 PEA (preliminary economic assessment) resulted in a reduced overall 450 kg/t acid requirement for lithium and boron recovery, and is expected to be sufficient for cesium and rubidium leaching.
• Recovery by ion exchange demonstrated: proof-of-concept experiments for Cs and Rb recovery completed using the initial selection of two ion exchange resins.

Previous work

The company disclosed significant critical Cs and Rb mineralization in the Lower zone at Bonnie Claire in its Sept. 17, 2025, news release. Notable Cs and Rb assays were present in all holes, including 248 parts per million Cs over 318.5 feet (BC 2401C), together with and 313 ppm Rb over 298.5 ft (BC 2401C). Both Cs and Rb grades display a strong positive correlation with lithium (Li) and boron (B) grades.

The company announced a metallurgical program in its Dec. 11, 2025, news release. The program was intended to investigate cesium and rubidium extraction based on the flowsheet outlined in the company's 2025 preliminary economic assessment (PEA).

Current program

The present work was conducted by Kemetco Research Inc. to supplement the metallurgical data generated for the PEA. A previously prepared composite sample from the earlier program was reassayed to determine concentrations of cesium, rubidium and other rare-earth elements. The cesium and rubidium head grades were 226 milligrams per kilogram and 297 mg/kg, respectively, while the lithium grade of the composite sample was 5,055 mg/kg. Based on these results, confirmatory leaching tests were performed under leaching conditions consistent with the earlier Bonnie Claire metallurgical work to quantify the extraction of Cs and Rb into solution.

The present work utilized leaching conditions previously established during metallurgical testwork on Bonnie Claire lithium clays. The baseline conditions consisted of approximately 700 kg/t sulphuric acid addition, a leaching temperature of 90 degrees C and a residence time of four hours. This achieved extractions of up to 95.9 per cent for Cs and 86.9 per cent for Rb. This test showed that Cs and Rb are readily dissolved under the applied acid leach conditions.

Proof-of concept ion exchange (IX) tests were conducted on representative process solutions to evaluate the separation behaviour of cesium and rubidium and to assess their potential recovery from lithium-bearing process streams. Two ion-exchange (IX) resins were evaluated for the selective Cs and Rb recovery.

Discussion

Over all, the results confirm that Cs and Rb can be effectively leached into solution and partially recovered using unoptimized ion exchange.

The current results confirm the extraction of additional critical minerals, with 95.9 per cent Cs and 86.9 per cent Rb, comparable with 98-per-cent lithium (Li) and 97-per-cent boron (B) extraction obtained previously from the same high-lithium composite sample.

The current testwork confirms the effectiveness of the current flowsheet, using the same baseline conditions; 700 kg/t sulphuric acid addition, a leaching temperature of 90 degrees C and a residence time of four hours. The counter-current leach configuration adopted in the 2025 PEA resulted in a reduced overall 450 kg/t acid requirement for lithium and boron recovery, and is expected to be sufficient for cesium and rubidium leaching.

Cs and Rb -- The recovery by ion exchange has been demonstrated, using the first two resins tested. Further work is recommended to expand beyond proof of concept.

About cesium and rubidium

Cesium and rubidium are used across a wide range of specialist uses including atomic clocks, cancer therapy, photoelectric cells, specialty glasses and drilling fluids. Current cesium and rubidium sources include the minerals pollucite and lepidolite, found in zoned pegmatites, along with potassium-bearing minerals and brines.

QP (qualified person) disclosure

Jeff Wilson, PhD, FGC, PGeo, vice-president of exploration for Nevada Lithium, is the qualified person as such term is defined in National Instrument 43-101, who has reviewed and approved the technical information in this news release, and is not independent of the company. The qualified person has reviewed and verified the scientific and technical information disclosed herein, including the sampling, analytical and metallurgical test data, through review of the laboratory's report and discussions with the laboratory.

The metallurgical results described in this news release are a summary of the testwork completed by Kemetco Research Inc., of Richmond, B.C., including assays, acid leaching tests and scoping ion exchange (IX) tests on a previously prepared composite sample from an earlier program. The results are described in a report prepared by the laboratory for the company. The testwork was generated by the laboratory using its standard procedures for sample preparation, assaying and metallurgical testing applicable to this type of material. Quality assurance and quality control measures applied by the laboratory include internal standards, blanks and duplicates in accordance with its laboratory protocols. The laboratory is independent of the company.

About Nevada Lithium Resources Inc.

Nevada Lithium Resources is a mineral exploration and development company focused on shareholder value creation through its core asset, the Bonnie Claire lithium project, located in Nye county, Nevada, where it holds a 100-per-cent interest.

The company recently filed a PEA on the Bonnie Claire lithium project. The PEA has an effective date of March 31, 2025, and presents a $6,829-million after-tax net present value (NPV) at an 8-per-cent discount rate, based on $24,000/tonne Li2CO3, $950/tonne boric acid, together with a 32.3-per-cent after-tax internal rate of return (IRR). Results of the PEA were announced in the company's news release, dated Aug. 6, 2025. The PEA is preliminary in nature and includes inferred mineral resources that are too speculative geologically to be classified as mineral reserves. There is no certainty that the results of the PEA will be realized.

We seek Safe Harbor.