"Why does my battery have such a short life?"に関する回答Get an iPad. Solved my problem. Seriously, I have 4 different Android tablets, 3 of them Samsung. Most of the time (9 out of 10) when I want to use them, they ran battery down while sitting idle. Never had that problem with my iPads (mini and 9.7”). I like Android, but that made me favour iOS devices.