I had this problem for some time. I have manjaro with dual boot. Whenever I boot it up, it takes alot of time to get everything running properly and even after that, some simple applications take alot of time to open. With this, the battery is draining alot faster then on windows. The battery is not exactly very good, but windows can go 2 hours, while manjaro struggles going 1 hour. It may be because I have manjaro on hdd, while windows on ssd, but if anybody had a similar problem and fixed it, I would like to know the solution.
Turn it around and your issue is solved.
Actually you might be surprised… see: