Microsoft, Tesla say software-defined batteries could mix and match power on the fly

To maximize battery life, a team of researchers from Microsoft, Tesla, and others have proposed combining several different types of batteries inside a single device, and managed by the operating system itself. 
Tests conducted by the researchers showed that mixing and matching batteries could improve the battery life of a wearable by about an hour. A two-in-one could see far better gains, however—up to a 22 percent improvement.
Unlike a fundamental improvement in battery technology,