Samsung is reportedly testing silicon-carbon battery technology for future flagship smartphones, even as the Galaxy S26 Ultra retains a 5,000mAh battery. A new report claims the company is evaluating high-capacity cells up to 20,000mAh using new stacking methods. While the technology allows higher energy density without increasing thickness, current prototypes fall sh…​Samsung is reportedly testing silicon-carbon battery technology for future flagship smartphones, even as the Galaxy S26 Ultra retains a 5,000mAh battery. A new report claims the company is evaluating high-capacity cells up to 20,000mAh using new stacking methods. While the technology allows higher energy density without increasing thickness, current prototypes fall sh…  ​ mobiles