General android accessories talk.
From having my S5 charged 2 times a day with very heavy use, now I charge it once at night with 20-30% left. Watchout, it really takes so long to charge the battery back!
The case could use some improvements. The hardness of materials on the side sometimes applies so much pressure on the volume and lock buttons that with the lightest breath you could lock or mess with the volume.
It scratches so easily.
Weight increased a lot so I can't take my galaxy s5 mpj extended battery with me for some jogging outside without having it bounce all around. I just take my old iPod now to listen to music.
The same applies to Google Nexus 5, lol