As I mentioned a few days ago , breakthroughs in battery tech always seem to be two years away, but there have been some modest but worthwhile developments. One of these, silicon-carbon batteries, is already found in some Android brands, and battery-test results clearly illustrate the benefits. But experts say it will be a little while before Apple adopts the new battery chemistry in future iPhones … There’s an ongoing arms race between battery capabilities and smartphone features. Batteries have been growing more efficient over the years, but at the same time those gains have been swallowed up by the increased power demands of larger and brighter screens, more powerful processors and so on. While most improvements in battery tech have been incremental, some of the latest Android phones have switched to a new battery chemistry which does demonstrate a step change in capacity.…