It appears the Grim Reaper may have a date with Adobe Flash Player (AFP) this December. According to a blog posted by Anthony LaForge, curator of AFP in Chrome, as Chrome version 55 is scheduled to roll-out this coming December.
At that time “Chrome 55 will make HTML5 the default experience“. But fear not, there will be a workaround for those few straggling sites that still rely on AFP. If that occurs “you’ll be prompted to enable Flash when you first visit the site. Aside from that, the only change you’ll notice is a safer and more power-efficient browsing experience.”
The actual transition to HTML5 will start in September with the release of Chrome version 53. With that release, Chrome will actually begin to block AFP.
Bottom line- HTML5 is more secure and pages will load faster so it should actually result in better battery life.