New background limits on location and Wi - Fi scans as well as the way apps behave in the background help prevent unnecessary battery usage, boosting battery life by a small margin. (android.gs)
The update also includes support for seven new countries / languages and should help your watch last longer, thanks to battery saving background limits. (techradar.com)
I have been looking into Android O and I have to say I am disappointed with the introduction of background limits. (mobilephonedevelopment.com)