One of the trends I noticed at IFA this week is that some companies are moving towards semi-solid-state batteries for portable devices, rather than using silicon-carbon, as we’ve seen in many Android phones coming out of China. While the unique selling points of silicon-carbon are higher capacity in a smaller footprint and the ability to keep the battery cool, semi-solid-state takes a different approach. The main advantage of using a semi-solid-state battery is durability. Batteries are actually pretty fragile. If you drop your phone and dent it, you could seriously damage the battery, but that’s not the case with semi-solid-state…