Rock Tech Lithium Closes $306,000 Second Tranche Non-Brokered Private Placement for Aggregate Gross Proceeds of $5.5 Million

Rock Tech Lithium Closes $306,000 Second

Tranche Non-Brokered Private Placement for

Aggregate Gross Proceeds of $5.5 Million

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UNITED STATES

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TORONTO

,

Sept. 5, 2025

/CNW/ -

Rock Tech Lithium Inc.

(TSX-V: RCK) (OTCQX: RCKTF)

(FWB: RJIB) (WKN: A1XF0V) (the "

Company

" or "

Rock Tech

") is pleased to announce, further to

its news releases dated

August 29

and

September 4, 2025

, the closing of its previously announced

second tranche non-brokered private placement offering (the "

Offering

") pursuant to which the

Company sold 340,000 units ("

Units

") at a price of

$0.90

per Unit for aggregate gross proceeds of

$306,000

. In aggregate, the Company has issued an aggregate of 6,093,221 Units for total gross

proceeds of

$5,483,898.90

under both the first and second tranches of the Offering.

Each Unit consists of one common share of the Company and one common share purchase warrant

of the Company, exercisable at price of

$1.17

to purchase one additional common share of the

company for a period of three years from the date of issuance thereof.

The Company intends to use the net proceeds raised from the first and second tranches of the

Offering to fund the advancement of the Guben Converter and for general corporate and working

capital purposes.

The second tranche of the Offering was completed pursuant to Section 2.3 of Ontario Securities

Commission Rule 72-503 –

Distributions Outside of

Canada

, accordingly, the securities issued in

connection with the second tranche of the Offering are not subject to a hold period in accordance

with applicable Canadian securities laws. Closing of the Offering remains subject to receipt of final

approval of the TSX Venture Exchange. The Company did not pay any commissions in connection

with the second tranche of the Offering.

This news release does not constitute an offer to sell or a solicitation of an offer to buy nor shall

there be any sale of any of the securities in any jurisdiction in which such offer, solicitation or sale

would be unlawful, including any of the securities in

the United States of America

. The securities

have not been and will not be registered under the United States Securities Act of 1933, as

amended (the "

U.S. Securities Act

") or any state securities laws and may not be offered or sold

within

the United States

or to, or for account or benefit of, U.S. Persons (as defined in Regulation S

under the U.S. Securities Act) unless registered under the U.S. Securities Act and applicable state

securities laws, or an exemption from such registration requirements is available.

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

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

release.

On behalf of the Company,

Mirco Wojnarowicz

CEO

ABOUT ROCK TECH LITHIUM

Rock Tech is enabling the battery age by making the battery industries in

Europe

and

North America

more independent and competitive. The Company's goal is to ensure the supply of high-quality,

locally produced lithium – supporting a resilient, sustainable, and transparent value chain from mine

to battery-grade material.

Rock Tech relies on responsible sourcing, state-of-the-art and proven technologies, and a clear

focus on circular economy principles. The Company's lithium hydroxide converter projects in Guben,

Germany

(24,000 tonnes LHM per year) and

Ontario, Canada

(up to 36,000 tonnes LCE per year)

form the foundation for a stable and regional supply to the battery and automotive industries. The

Guben converter has been recognized as a strategic project under the EU Critical Raw Materials

Act.

The raw materials for Rock Tech's converter projects are sourced exclusively from verifiably ESG-

compliant suppliers. In

Canada

, Rock Tech relies, among other sources, on its wholly owned

Georgia Lake Project, which ensures a stable and sustainable supply for the North American market

and is being developed in close partnership with local First Nations communities. By integrating

recycled materials, the company aims to close the local battery loop.

With its facilities, Rock Tech makes a central contribution to battery-grade material sovereignty and

the achievement of climate targets. The company works in partnership with industry, policymakers,

and community groups, and is committed to open communication and the highest environmental

standards.

CAUTIONARY NOTE CONCERNING FORWARD-LOOKING INFORMATION

Certain statements contained in this news release constitute "forward-looking information" under

applicable securities laws and are referred to herein as "forward-looking statements". All

statements, other than statements of historical fact, which address events, results, outcomes or

developments that the Company expects to occur are forward-looking statements. When used in this

news release, words such as "expects", "anticipates", "plans", "predicts", "believes", "estimates",

"intends", "targets", "projects", "forecasts", "may", "will", "should", "would", "could" or negative

versions thereof and other similar expressions are intended to identify forward-looking statements.

In particular, this press release contains forward-looking information pertaining to the expectations of

the Company's management regarding the use of proceeds and the use of the available funds

following completion of the Offering; receipt of all necessary approvals for the Offering; Rock Tech's

opinions, beliefs and expectations regarding the Company's business strategy, development and

exploration opportunities and projects; and plans and objectives of management for the Company's

operations and properties. The forward-looking information in this news release is based on several

key assumptions and material factors, including but not limited to, obtaining necessary board,

shareholder, and regulatory approvals. The forward-looking information also assumes favorable

market conditions for lithium. Forward-looking statements by their nature are based on assumptions

and involve known and unknown risks, uncertainties and other factors which may cause the actual

results to differ materially from the forward-looking statements, including general business,

economic, competitive, political and social uncertainties; delay or failure to receive regulatory

approvals; investor demand; changes in project plans; and risks, uncertainties and other factors

discussed in the Company's public disclosure documents available under its profile on SEDAR+. No

assurances can be given that any of the events anticipated by the forward-looking statements will

transpire or occur, and the Company cautions the reader not to place undue reliance upon any such

forward-looking statements. The Company does not intend, nor does it assume any obligation to

update or revise any of the forward-looking statements, whether as a result of new information,

changes in assumptions, future events or otherwise, except to the extent required by applicable law.

SOURCE

Rock Tech Lithium Inc.

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For further information:

For further information: Kerstin Wedemann, Chief Legal & Corporate

Officer - [email protected]; +49 2102 894 1122; Rock Tech Lithium Inc, 2700-40

Temperance Street, Toronto ON M5H 0B4 CAN.

CO: Rock Tech Lithium Inc.

CNW 15:06e 05-SEP-25