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Battery Mineral Resources’ Wholly-owned Subsidiary Minera BMR Spa Helps Ensure Labor Stability Into 2028 with New Collective Agreements

Corporate Updates

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Battery Mineral Resources’ Wholly-owned Subsidiary Minera BMR Spa Helps

Ensure Labor Stability Into 2028 with New Collective Agreements

Vancouver, British Columbia – (October 27th, 2025) – Battery Mineral Resources Corp. (TSXV:

BMR) (OTCQB: BTRMF) (“ Battery” or “ BMR” or the “ Company”) is pleased to announce on

behalf of its Chilean subsidiary Minera BMR, Spa, the successful conclusion of the collective

bargaining processes with the two labor unions that represent the majority of its workforce at

the Cinabrio and San Andrés mining operations. These agreements, signed under Chilean

labor regulations, help to ensure labor stability into 2028.

Currently, 76% of the Company's 323 employees are unionized, divided between two labor

unions:

• Mine Union, Minas Cinabrio y San Andrés , representing primarily mine workers,

includes 95 members (29% of the total workforce). This union signed a collective

bargaining agreement on May 1, 2025, valid through May 13, 2028.

• Concentrator Union , which includes personnel from all operational areas — notably

from the processing plant, administrative functions, and supervisory roles — consists

of 152 members (47% of the workforce). This union entered into a new collective

agreement effective October 18, 2025, valid until October 18, 2028.

The remaining 24% of the workforce (76 employees) is not unionized.

Both agreements were negotiated to have a term of 36 months , which is the maximum

permitted under Chilean law . During this period, unions are legally prohibited from initiating

strikes or protest actions, allowing the Company to operate without the risk of such labor

disruptions.

“These long -term agreements reflect the constructive dialogue we maintain with our

workforce and underscore our commitment to labor stability,” said Laz Nikeas, Chief Executive

Officer of Minera BMR Spa. “They play an important role in maintaining stable operations and

give us the confidence to execute our long-term production and development plans.”

About Battery Mineral Resources Corp.

Battery Mineral Resources’ mission is to build a mid -tier copper producer. The Company has

recently initiated mine and mill operations at the Punitaqui Mining Complex, a historic copper-

gold, and silver-producing mine in the Coquimbo region of Chile. The Company’s portfolio also

includes 100% -owned ESI Energy Services Inc. and North A merican mineral exploration

assets. The Company is focused on providing shareholders with accretive exposure to copper

and the global trend of electrification while targeting growth through cash flow, exploration,

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and acquisitions in favorable mining jurisdictions. Further information about BMR and its

projects can be found on www.bmrcorp.com.

For more information, please contact:

Lazaros Nikeas, CEO

Phone: +1 (604) 628-1110

[email protected]

Neither the TSXV nor its Regulation Services Provider (as that term is defined in the policies

of the TSXV) accepts responsibility for the adequacy or accuracy of this press release.