Id of alternative attainable high-value by-products inside the present lithium Mineral Useful resource presentations the extremely developed pegmatites at Shaakichiuwaanaan as a possible primary host for additional crucial metals.

VANCOUVER, BC, June 10, 2025 /PRNewswire/ – June 11, 2025 – Sydney, Australia

HIGHLIGHTS

• Pollucite showed because the most important mineral host for the caesium found out just lately at each the Vega and Rigel zones on the CV13 Pegmatite:
  • Pollucite is regarded as the optimum mineral host for caesium in Li-Cs-Ta (“LCT”) pegmatites because of its elevated caesium content material (most often >30%) and its relative amusement of processing and fix.
  • As much as 75% pollucite in particular person core pattern (1.1 m at 26.6% Cs₂O¹).
• Caesium inside the Vega and Rigel zones can be integrated within the upcoming Mineral Useful resource replace for the Venture, centered for Q3-2025. Interpreted sizes of the Vega and Rigel zones are important – footprints of ~800 m x 250 m (Vega) and ~200 m x 100 m (Rigel).
• The Corporate has commenced comparing choices to move and incorporate the caesium alternative at CV13 as a possible spinoff into the whole monetary expansion of the Venture, to apply crowning glory of the lithium-only Feasibility Learn about at the CV5 Pegmatite.
• Caesium pricing varies in keeping with its end-product method and purity; alternatively, in its delicate method, caesium steel (Cs >99.5%) is a elevated price commodity matching to gold and these days trades round US$2,540/ounces (except for VAT, Supply – Shanghai Metal Markets).
• Shaakichiuwaanaan LCT pegmatites are extremely developed during the means of crystal fractionation throughout formation, to bring about utmost enrichment of lithium, caesium, and tantalum – every at probably world-class scale.
• Tantalum and gallium are already a part of the present Mineral Useful resource with attainable to turn out to be significant era by-products.
• The lithium-only Feasibility Learn about in keeping with the CV5 Mineral Useful resource attribute rest on-track for crowning glory in Q3-2025, with the commercial attainable of the crucial steel by-products to be assessed thereafter.

Ken Brinsden, President, CEO, and Managing Director, feedback: “The confirmation of widespread pollucite mineralization – the optimal host mineral for caesium – at the Vega and Rigel zones marks another important step forward in evaluating the economic potential of this exciting discovery. As we advance towards a preliminary mineral processing program to evaluate recovery of caesium, the team is working on a maiden MRE for caesium that is anticipated to be announced before the end of third-quarter 2025.

“The presence of vital caesium mineralization at Shaakichiuwaanaan, along with lithium and tantalum, reinforces the fantastic endowment of the geology and the possibility of alternative crucial and strategic metals to additional beef up and diversify era Venture economics. We’re very willing to discover those value-add alternatives on manage of what’s already identified as a world-class lithium pegmatite in its personal proper,” added Mr. Brinsden.

PATRIOT BATTERY METALS INC. (THE “COMPANY” OR “PATRIOT”) (TSX: PMET) (ASX: PMT) (OTCQX: PMETF) (FSE: R9GA) is pleased to provide an update on caesium – a high-value critical and strategic metal – identified at the CV13 spodumene pegmatite, at its 100%-owned Shaakichiuwaanaan Property (the “Feature” or “Venture”) located in the Eeyou Istchee James Bay region of Quebec. The CV13 Spodumene Pegmatite is located approximately 3 km west-southwest along geological trend of the CV5 Spodumene Pegmatite, which is situated approximately 13 km south of the regional and all‑weather Trans-Taiga Road and powerline infrastructure corridor, and is accessible year-round by all-season road.

The Shaakichiuwaanaan Li-Cs-Ta (“LCT”) pegmatites are highly evolved through the process of crystal fractionation during formation, whereby mineral crystallization leads to progressive changes in the chemistry of the remaining melt, resulting in increasingly rare minerals being formed as the process unfolds. This process of pegmatite formation most commonly leads to only modest enrichment of lithium and other critical metals. However, in the LCT pegmatites at Shaakichiuwaanaan this process has resulted in the extreme enrichment of lithium, caesium, and tantalum – each at potentially world-class scale – as well as other potentially recoverable critical and strategic metals (e.g., gallium).

Each of these critical metals could become further value-added by-products to the envisioned lithium operation at Shaakichiuwaanaan. Additional information is provided below describing the caesium opportunity and the steps being taken to evaluate development of this unique asset. Further details will be provided on the other potential by-products identified, including tantalum and gallium, in the coming weeks.

CAESIUM OPPORTUNITY

In news releases dated March 2 and April 9, 2025, the Corporate introduced the invention of vital caesium mineralization in drill gap on the CV13 Pegmatite inside the Vega and Rigel zones. Initial drill results include:

• 11.1 m at 4.87% Cs₂O, together with 7.1 m at 7.39% Cs₂O (Vega, CV24-520), and
• 5.0 m at 13.32% Cs₂O, together with 2.0 m at 22.90% Cs₂O (Rigel, CV23-255).

The Corporate is happy to file that XRD-Rietveld mineralogical research finished on drill core samples from the Vega and Rigel caesium zones has showed pollucite because the dominant caesium-bearing mineral provide (Determine 1). A pollucite content material elevated of 74.2% was once reported over 1.1 m in drill gap CV23-204, assaying 26.6% Cs₂O.

Pollucite is regarded as the optimum mineral host to caesium in LCT pegmatites because of its very elevated caesium content material (most often >30%) and its relative amusement of processing and fix. Pollucite is most often recovered the use of usual and standard ore sorting modes in addition to attainable secondary flotation. The Corporate has finished number of drill core samples from the Vega Zone for an ore sorting check program that can assessment pollucite (caesium) pay attention fix forward of the standard spodumene (lithium) and tantalite (tantalum) fix circuits.

The usage of a nil.5% Cs₂O grade constraint inside the wider CV13 Pegmatite frame, the interpreted extent of the Vega and Rigel caesium zones has been additional delicate (Determine 2). The footprint of caesium mineralization on the Vega Zone has been traced over a basic department of a minimum of 800 m x 250 m and is composed of 2 proximal flat-lying lenses, at a intensity of ~110 m, with a real thickness of <2 m and as much as ~10 m and ~6 m, respectively. At Rigel, the footprint of caesium mineralization has been traced over a basic department of least 200 m x 100 m and is composed of a unmarried, shallow dipping lens at a intensity of ~50 m with a real thickness of <2 m to ~6 m.

The interpreted dimensions for the Vega and Rigel caesium zones will method the principle constraints to the next prevent modelling and Mineral Useful resource Estimate expected to be introduced in Q3-2025.

Mineral deposits of caesium (pollucite hosted) are extraordinarily uncommon globally and constitute probably the most fractionated attribute of LCT pegmatite programs, which might be successfully the one number one supply of caesium globally. Financial deposits of caesium pegmatite are most often on a smaller scale of <10 kt to 350 kt in dimension in comparison to deposits of lithium pegmatite that most often territory within the tens of millions of tonnes in dimension (<10 Mt and infrequently over 100 Mt).

Globally, it’s estimated solely 3 (3) number one caesium mines have traditionally operated and all have been pollucite hosted – Tanco (Canada), Bikita (Zimbabwe), and Sinclair (Australia). At Bikita and Sinclair, the pollucite assets have been exhausted in 2018 and 2019, respectively. Tanco is known to be coming near the tip of its mine-life with extraction from present tailings piles and/or mine remnants being explored. At Sinclair³, the mine produced 18,629 tonnes of pollucite pegmatite ore grading 8.3% Cs₂O for a contained steel content material of one,551 tonnes Cs₂O. Compared to the scale of the interpreted caesium zones at Vega (~800 m x 250 m) and Rigel (~200 m x 100 m), the principle ore frame at Sinclair was once reasonably miniature and leisurely ~60 m lengthy, as much as 20 m huge, and as much as 10 m thick, and was once positioned at a intensity~40 m from floor.    

NEXT STEPS

During the lithium centered exploration and useful resource building drilling to past on the Feature, the Corporate has known alternative high-value crucial steel attainable by-products along with the present large-scale lithium Mineral Useful resource at Shaakichiuwaanaan, specifically caesium, tantalum, and gallium.

The caesium inside the Vega and Rigel zones on the CV13 Pegmatite can be integrated within the upcoming Mineral Useful resource replace for the Venture, centered for Q3-2025. This MRE, which would be the 4^th for the Venture, will after come with lithium, caesium, tantalum, and gallium and method the foundation for additional analysis of secondary crucial steel fix to the principle lithium. Every of those crucial metals has the possible to turn out to be a significant era spinoff as a part of the whole era Venture building at Shaakichiuwaanaan.

The lithium-only Feasibility Learn about in keeping with the CV5 Mineral Useful resource attribute of the whole Shaakichiuwaanaan MRE is on-track for crowning glory in Q3-2025 and rest the near-term focal point for the Corporate. The industrial attainable in crucial steel by-products can be assessed thereafter, with numerous research underway similtaneously to higher assessment the alternatives provide for caesium, tantalum, and gallium in particular.

The Corporate has finished its number of caesium mineralized drill core from the Vega Zone and anticipates an ore-sorting check program for the fix of pollucite (caesium) to start out in a while. Moreover, the Corporate has just lately finished a tantalum fix program at SGS Canada’s Lakefield facility the use of expected early mine-life open-pit and underground subject matter from the CV5 Pegmatite and is compiling the effects.

CAESIUM MARKET

Caesium is indexed as a crucial and strategic steel by way of the province of Quebec (Canada), Canada, Japan, and the United States. Mineral deposits of caesium (in pollucite) are extraordinarily uncommon globally. Because of its high-density, low toxicity, biodegradable nature and recoverability, caesium is impaired to backup the crowning glory of oil and gasoline wells at elevated force and temperature. Caesium isotopes are impaired as an atomic expression frequency usual in chip scale atomic clocks, taking part in an important position in plane steerage programs, world positioning satellites, web and cell phone transmissions, and medical scientific analysis.

The caesium marketplace’s expansion is estimated to be basically pushed by way of expanding call for within the scientific, length, and oil & gasoline exploration industries. Caesium chloride, particularly, is anticipated to be the fastest-growing product department because of its programs in scientific imaging and most cancers treatment.

Caesium pricing varies in keeping with its end-product method and purity; alternatively, in its delicate method, caesium steel (Cs >99.5%) is a elevated price commodity matching to gold and these days trades round US$2,540/ounces (except for VAT, Supply – Shanghai Metal Markets). 

QUALIFIED/COMPETENT PERSON

The guidelines on this information shed that pertains to exploration effects for the Shaakichiuwaanaan Feature is in keeping with, and reasonably represents, knowledge compiled by way of Mr. Darren L. Smith, M.Sc., P.Geo., who’s a Certified Individual as outlined by way of Nationwide Software 43-101 – Requirements of Disclosure for Mineral Initiatives, and member in excellent status with the Ordre des Géologues du Québec (Geologist Allow quantity 01968), and with the Affiliation of Skilled Engineers and Geoscientists of Alberta (member quantity 87868). Mr. Smith has reviewed and authorized the technical knowledge on this information shed.

Mr. Smith is an Govt and Vice President of Exploration for Patriot Battery Metals Inc. and holds usual stocks, Limited Proportion Devices (RSUs), and Efficiency Proportion Devices (PSUs) within the Corporate.

Mr. Smith has ample revel in, which is related to the manner of mineralization, form of bank into account, and to the actions being undertaken to qualify as a Competent Individual as described by way of the Australasian Code for Reporting of Exploration Effects, Mineral Assets and Ore Reserves (the JORC Code). Mr. Smith sees eye to eye to the inclusion on this information shed of the issues in keeping with his knowledge within the method and context during which it sounds as if.

ABOUT PATRIOT BATTERY METALS INC.

Patriot Battery Metals Inc. is a hard-rock lithium exploration corporate interested by advancing its district-scale 100%-owned Shaakichiuwaanaan Feature (previously referred to as Corvette) situated within the Eeyou Istchee James Bay patch of Quebec, Canada, which is out there year-round by way of all-season highway and is proximal to regional powerline infrastructure. The Shaakichiuwaanaan Mineral Useful resource⁴, which incorporates the CV5 & CV13 spodumene pegmatites, totals 108.0 Mt at 1.40% Li₂O Indicated, and 33.3 Mt at 1.33% Li₂O Inferred, and ranks as the most important lithium pegmatite useful resource within the Americas, and the 8^th greatest lithium pegmatite useful resource on the earth.⁵ Shaakichiuwaanaan additionally holds important attainable for alternative crucial and strategic metals together with caesium, tantalum, and gallium.

A Initial Financial Overview (“PEA”) was once introduced for the CV5 Pegmatite (lithium) on August 21, 2024, and highlights Shaakichiuwaanaan as a possible North American lithium uncooked fabrics powerhouse. The PEA outlines the possibility of a aggressive and globally important high-grade lithium undertaking concentrated on as much as ~800 ktpa spodumene pay attention the use of a easy Vague Media Divorce (“DMS”) solely procedure flowsheet.

Please additionally please see the Corporate’s steady disclosure filings, to be had underneath its profile at www.sedarplus.ca and www.asx.com.au, for to be had exploration knowledge.

This information shed has been authorized by way of the Board of Administrators.

“KEN BRINSDEN”
Kenneth Brinsden, President, CEO, & Managing Director

Olivier Caza-Lapointe
Head, Investor Members of the family – North The united states
T: +1 (514) 913-5264
E: [email protected]

APPENDIX 1 – JORC CODE 2012 TABLE 1 (ASX LISTING RULE 5.8.2)

Category 1 – Sampling Tactics and Information

Category 2 – Reporting of Exploration Effects

DISCLAIMER FOR FORWARD-LOOKING INFORMATION

This information shed comprises “forward-looking statements” and “forward-looking information” inside the that means of appropriate securities rules.

All statements, alternative than statements of provide or ancient information are forward-looking statements. that contain dangers and uncertainties. Ahead-looking statements contain identified and unknown dangers, uncertainties and suppositions and accordingly, untouched effects may just fluctuate materially from the ones expressed or implied in such statements. You’re therefore cautioned to not park undue reliance on forward-looking statements. Ahead-looking statements are most often known by way of phrases comparable to “plan”, “development”, “growth”, “continued”, “intentions”, “expectations”, “strategy”, “opportunities”, “anticipated”, “trends”, “potential”, “outlook”, “ability”, “additional”, “on track”, “prospects”, “viability”, “estimated”, “reaches”, “enhancing”, “strengthen”, “target”, “will”, “believes”, or permutations of such phrases and words or statements that sure movements, occasions or effects “may”, “could”, “would”, “might” or “will” be taken, happen or be accomplished.  Ahead-looking statements come with, however aren’t restricted to, statements relating to: the facility of the the extremely developed pegmatites at Shaakichiuwaanaan to be a possible primary host for additional crucial metals, timing of the upcoming Mineral Useful resource replace for the Venture, centered for Q3-2025, and of the crowning glory of the feasibility find out about, the opportunity of caesium, tantalum and gallium an as by-products and the possibility of alternative crucial and strategic metals to additional beef up and diversify era Venture economics.

Ahead-looking statements are based totally upon sure suppositions and alternative impressive elements that, if unfaithful, may just motive the untouched effects, efficiency or achievements of the Corporate to be materially other from era effects, efficiency or achievements expressed or implied by way of such statements. There may also be negative commitment that forward-looking statements will end up to be correct. Key suppositions upon which the Corporate’s forward-looking knowledge is based totally come with, with out limitation, the cost of caesium, the caesium expansion marketplace, that proposed exploration and MRE paintings at the Feature will proceed as anticipated, the accuracy of stock and useful resource estimates, the classification of assets between inferred and the suppositions on which the stock and useful resource estimates are based totally, long-term call for for spodumene provide, and that exploration and building effects proceed to backup control’s wave plans for Feature building.

Ahead-looking statements also are matter to dangers and uncertainties going through the Corporate’s industry, any of which may have a subject matter antagonistic impact at the Corporate’s industry, economic status, result of operations and expansion possibilities. Readers must imagine reviewing the realistic to life possibility dialogue within the Corporate’s most up-to-date Annual Data Method filed on SEDAR+, for a fuller working out of the hazards and uncertainties that impact the Corporate’s industry and operations.

Even if the Corporate believes its expectancies are based totally upon affordable suppositions and has tried to spot impressive elements that might motive untouched movements, occasions or effects to fluctuate materially from the ones described in forward-looking statements, there is also alternative elements that motive movements, occasions or effects to not be as expected, estimated or supposed. There may also be negative commitment that forward-looking knowledge will end up to be correct. If any of the hazards or uncertainties discussed above, which aren’t exhaustive, materialize, untouched effects would possibly range materially from the ones expected within the forward-looking statements.

The forward-looking statements contained herein are made solely as of the past hereof. The Corporate disclaims any purpose or legal responsibility to replace or revise any forward-looking statements, whether or not on account of brandnew knowledge, era occasions or differently, excluding to the level required by way of appropriate regulation. The Corporate qualifies all of its forward-looking statements by way of those cautionary statements.

The manufacturing goal from the PEA referred to on this shed was once reported by way of the Corporate in response to ASX List Rule 5.16 on August 21, 2024. The Corporate confirms that, as of the past of this announcement, all subject matter suppositions and technical parameters understructure the manufacturing goal within the fresh announcement proceed to use and feature now not materially modified.

COMPETENT PERSON STATEMENT (ASX LISTING RULE 5.23) FOR SHAAKICHIUWAANAAN MRE

The mineral useful resource estimate on this shed was once reported by way of the Corporate in response to ASX List Rule 5.8 on Might 13, 2025. The Corporate confirms that, as of the past of this information shed, it’s not acutely aware of any brandnew knowledge or knowledge verified by way of the competent individual that materially impacts the ideas integrated within the announcement and that every one subject matter suppositions and technical parameters understructure the estimates within the announcement proceed to use and feature now not materially modified. The Corporate confirms that, as on the past of this announcement, the method and context during which the competent user’s findings are offered have now not been materially changed from the fresh marketplace announcement.

SOURCE Patriot Battery Metals Inc.