Apple blames exposure to 'ambient air' for iPhone 6S battery failures - The Verge
Apple to replace iPhone batteries regardless of test results, says report
Amazon.com: [3200mAh] Battery for iPhone 6S (2023 New Version), Conqto New Upgraded Higher Capacity 0 Cycle Battery Replacement for iPhone 6S Model A1633, A1688, A1700 with Complete Professional Repair Tool Kits :