Leak: test reports for 12,000mAh and 18,000mAh Silicon-Carbon batteries from Samsung

"The 12,000mAh battery, SDI-DC12K-SiC-V2, is a dual cell design consisting of one 6,800mAh 4.7mm cell and one 5,200mAh 3.2mm cell. The stack thickness should be under 9.3mm (though 2 out of 7 test samples ended up being thicker)."

"The 18,000mAh battery, SDI-TC18K-SiC, is a triple cell design: 6,699mAh 4.2mm, then 6,000mAh 3.9mm and 5,257mAh 3.28mm. The goal for the stack is around 12.3mm, but thermal interface layers between the cells pushed the test samples to 12.8mm."

"According to the test notes, Samsung SDI is looking to redesign the layers between the cells and how they are stacked. It is also working on the battery management firmware."

Samsung SDI is testing Silicon-Carbon composite batteries in multiple capacities for future mobile devices. The 12,000mAh dual-cell design combines 6,800mAh and 5,200mAh cells with a target thickness under 9.3mm, while the 18,000mAh triple-cell design stacks three cells totaling approximately 18,000mAh with a 12.3mm target thickness. Both designs aim for 1,500 charge cycles, though current test samples show failures around 960 cycles. The company is addressing thermal interface layer thickness issues and optimizing battery management firmware. The 12,000mAh variant targets 20-25 hours of screen-on time, while the 18,000mAh prioritizes capacity and endurance. These thin, high-capacity batteries could benefit flagship phones and foldable devices.

Read at GSMArena.com