I've been using ubuntu on my macbook air for a few weeks now

I have found some issues along the way and greatly appreciate all your efforts in these forums!

I have been trying to get battery monitor to work https://github.com/maateen/battery-monitor, but this has been unsuccessful

I would like to find out why my battery only charges to 80%, never had this issue in OSX in the past. When I charge my laptop running ubuntu it only charges to around 80% at which point the charger LED changes to green (in OSX that meant that the battery was at 100%)

Please help me figure out why this is happening