Microsoft Edge more battery efficient? Opera says no way

Opera Browser claims they are the most battery efficient web browser, not Microsoft Edge.
When it comes to web browsers, fights over which one is fastest or more efficient are not really new. Microsoft recently put out a video claiming its new Edge browser is 70 per cent more battery efficient compared to Google Chrome and Opera. Now Opera Browser has put out a blogpost disputing the claim, and says their browser is the one with the battery performance edge.
In the blogpost, Opera says the