Which way round does the battery go? Microsoft are fixing it

Microsoft unveils Instaload technology to banish battery bungling | The Daily Telegraph

"The US technology colossus overnight unveiled 'InstaLoad' technology
that lets batteries energise devices regardless of how the negative and
positive polarity connections are in place."

Wow - one of my big cripes - which way round does the battery go.?
So many gadgets and they "chart" is usually black on black and hard to see.
Go for it Microsoft