This morning a message popped up on my Xperia Z2 asking to download the Xperia System Update 23.5.A.1.291 (644.9 MB). If I remember correctly it’s the 3rd system update from SONY to its Xperia Z2. The system already has Android Marshmallow 6.01
After downloading and applying 319 updates the first thing it said that a new SD card has been detected and it needs to be set up or ejected. I touched on setup and all done. Next, message talked about the
Charging Optimization(recommended). The amount of charge has been adjusted to increase battery lifespan.
This may shorten the usage time of your device.
You can change this setting in Settings–>About Phone–>Status–> Charging Optimization.
Will see how good is this new optimization feature.