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E3 Lithium Commences Drilling Lithium #3 Well Drilling Program Initiates Second Phase of Demonstration

Exploration Programs

Suite 1520 – 300 5th Ave SW

Calgary, AB T2P 3C4

Tel: +1 (587) 324-2775

Email: [email protected]

Website: e3lithium.ca

E3 LITHIUM COMMENCES DRILLING LITHIUM #3 WELL

DRILLING PROGRAM INITIATES SECOND PHASE OF DEMONSTRATION

CALGARY, ALBERTA, October 29, 2025 – E3 LITHIUM LTD. (TSXV: ETL) (FSE: OW3) (OTCQX: EEMMF), (“E3

Lithium” or the “Company”) a leader in Canadian lithium development, has commenced drilling of its lithium

development well as part of Phase 2 of its Demonstration Facility development in central Alberta.

This is E3 Lithium’s third lithium well drilled into the Leduc Formation. This next step in development builds

upon the successful production of battery -grade lithium carbonate during Phase 1 of the Demonstration

program in early October 2025. Phase 1 validated the design of E3 Lithium’s Direct Lithium Extraction (DLE)

equipment at this scale. Results from this well will provide additional reservoir performance data and brine

analytics to support the design of the commercial lithium facility . The objectives of this next drilling phase

include:

• Validating subsurface geology through detailed analysis of core samples and integrate petrophysical

properties derived from comprehensive well-logging datasets

• Collecting reservoir data to inform commercial wellfield and facility design

• Providing brine for continued operation of its DLE and processing equipment previously commissioned

in Phase 1 of the Demonstration Facility

• Support engineering and permitting work for E3 Lithium’s upcoming commercial facility

“This well kicks off the second phase our Demonstration program, another important step forward as we

advance toward commercial operations,” said Chris Doornbos, President and CEO of E3 Lithium. “Our drilling

activities provide important data to inform our continued project design and enhances our understanding of

reservoir performance capabilities.”

Drilling and testing activities are expected to continue into November and the Company will provide updates

on drilling and testing operations.

Drilling Underway at the Demonstration Facility

Suite 1520 – 300 5th Ave SW

Calgary, AB T2P 3C4

Tel: +1 (587) 324-2775

Email: [email protected]

Website: e3lithium.ca

ON BEHALF OF THE BOARD OF DIRECTORS

Chris Doornbos, President, CEO & Chair

E3 Lithium Ltd.

E3 Lithium - Investor Relations

Rob Knowles

[email protected]

587-324-2775

E3 Lithium - Media Inquiries

External Relations

[email protected]

587-324-2775

About E3 Lithium

E3 Lithium is a development company with a total of 21.2 million tonnes of lithium carbonate equivalent (LCE)

Measured and Indicated1 resources as well as 0.3 Mt LCE Inferred mineral resources 2 in Alberta and 2.5 Mt

LCE Inferred mineral resources 3 in Saskatchewan. The Clearwater Pre- Feasibility Study outlined a 1.13 Mt

LCE proven and probable mineral reserve with a pre-tax NPV(8%) of USD 5.2 Billion with a 29.2% IRR and an

after-tax NPV(8%) of USD 3.7 Billion with a 24.6% IRR1.

1: The Clearwater Project NI 43-101 Pre-Feasibility Study, effective June 20, 2024 (the “PFS”), is available on the E3

Lithium website (www.e3lithium.ca/technical-reports/) and SEDAR+ (www.sedarplus.ca).

2: The mineral resource NI 43-101 Technical Report for the Garrington District Lithium Resource Estimate, effective June

25, 2025, identified 5.0 Mt LCE (measured and indicated) and 0.3 Mt LCE (inferred) and is available on the E3 Lithium

website (www.e3lithium.ca/technical-reports/) and SEDAR+ (www.sedarplus.ca).

3: The mineral resource NI 43-101 Technical Report for the Estevan Lithium District, effective May 23, 2024, identified 2.5

Mt LCE (inferred) and is available on the E3 Lithium website (www.e3lithium.ca/technical-reports/) and SEDAR+

(www.sedarplus.ca). 

Unless otherwise indicated, Kevin Carroll, P. Eng., Chief Development Officer and a Qualified Person under

National Instrument 43-101, has reviewed and is responsible for the technical information contained on this

news release.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies

of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Forward-Looking Statements

This news release includes certain forward -looking statements as well as management’s objectives,

strategies, beliefs and intentions or forward-looking information within the meaning of applicable securities

laws. Forward-looking statements are frequently identified by such words as “believe”, “may”, “will”, “plan”,

“expect”, “anticipate”, “estimate”, “intend”, “project”, “potential”, “possible” and similar words referring to

future events and results. Forward -looking statements are based on the current opinions, expectations,

estimates and assumptions of management in light of its experience, and perception of historical trends, but

Suite 1520 – 300 5th Ave SW

Calgary, AB T2P 3C4

Tel: +1 (587) 324-2775

Email: [email protected]

Website: e3lithium.ca

such statements are not guarantees of future performance. In particular, this news release contains forward-

looking information relating to: the development of the Company's Demonstration Facility. In preparing the

forward-looking information in this news release, the Company has applied several material assumptions,

including, but not limited to, that any additional financing needed will be available on reasonable terms; the

exchange rates for the U.S. and Canadian currencies will be consistent with the Company’s expectations; that

the current exploration, development, environmental and other objectives concerning the Demonstration

Facility can be achieved and that its other corporate activities will proceed as expected; that general business

and economic conditions will not change in a materially adverse manner; that all necessary governmental

approvals for the planned activities on the Demonstration Facility will be obtained in a timely manner and on

acceptable terms; that the Company will be able to obtain all regulatory and requisite approvals in a timely

manner and on acceptable terms.

All forward-looking information (including future-orientated financial information) is inherently uncertain and

subject to a variety of assumptions, risks and uncertainties, including the speculative nature of mineral

exploration and development, fluctuating commodity prices, the effectiveness and feasibility of emerging

lithium extraction technologies which have not yet been tested or proven on a commercial scale or on the

Company’s brine, risks related to the availability of financing on commercially reas onable terms and the

expected use of proceeds; operations and contractual obligations; changes in estimated mineral reserves or

mineral resources; future prices of lithium and other metals; availability of third party contractors; availability

of equipment; failure of equipment to operate as anticipated; accidents, effects of weather and other natural

phenomena and other risks associated with the mineral exploration industry; the Company’s lack of operating

revenues; currency fluctuations; risks related to dependence on key personnel; estimates used in financial

statements proving to be incorrect; competitive risks and the availability of financing, as described in more

detail in our recent securities filings available under the Company’s profile on SEDAR+ ( www.sedarplus.ca).

Actual events or results may differ materially from those projected in the forward-looking statements and we

caution against placing undue reliance thereon. We assume no obligation to revise or update these forward-

looking statements except as required by applicable law.