v3.26.3
Cover - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Jun. 30, 2026
Sep. 08, 2026
Dec. 31, 2025
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Jun. 30, 2026    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2026    
Current Fiscal Year End Date --06-30    
Entity File Number 001-41811    
Entity Registrant Name AMERICAN BATTERY TECHNOLOGY COMPANY    
Entity Central Index Key 0001576873    
Entity Tax Identification Number 33-1227980    
Entity Incorporation, State or Country Code NV    
Entity Address, Address Line One 100 Washington Street    
Entity Address, Address Line Two Suite 100    
Entity Address, City or Town Reno    
Entity Address, State or Province NV    
Entity Address, Postal Zip Code 89503    
City Area Code (775)    
Local Phone Number 473-4744    
Title of 12(b) Security Common stock, $0.001 par value    
Trading Symbol ABAT    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 438
Entity Common Stock, Shares Outstanding   142,577,758  
Documents Incorporated by Reference [Text Block] Certain information in Part III of this Annual Report on Form 10-K is incorporated by reference to our definitive Proxy Statement for the 2026 Annual Meeting of Shareholders to be filed with the Securities and Exchange Commission within 120 days after the fiscal year ended June 30, 2026.    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Listing, Par Value Per Share $ 0.001    
Auditor Name KPMG LLP    
Auditor Firm ID 185    
Auditor Location Portland, Oregon