The battery icon on the panel only changes when I restart or log-out then log back in. For example, my battery is low at 15%, however, the icon indicates its at 79%, which was the percentage when I first booted into the OS.
well its not an solution ubuntu does good for me but have an issue with elementary then its an bug!!..– Mohammad YaseerJan 18, 2016 at 16:15
This is a known bug, and is being tracked and worked on: https://bugs.launchpad.net/ubuntu/+source/indicator-power/+bug/1315434
Seems to be as a driver issue. It seems you are using a laptop, and in that case updates drivers should be available for your laptop from the manufacturer's website. Try installing that
1Sorry, I'm a bit of noob. How do I download the drivers? It seems like they're only windows compatible. I have a lenoxo ideapad flex 15.– hm27Nov 27, 2015 at 2:03
Me too had the same issue, Power Indicator didn't update once its booted. Found answer in G+. And it works fine for me. Source here.
Downgrade upower to get it working again.
sudo apt-get install upower=0.9.23-2ubuntu1
After downgrade, Do this to prevent the package being automatically upgraded.
sudo apt-mark hold upower