Hello all, I have the same problem with my macbook pro. I have a MacBook Pro (Retina, 15-inch, Late 2013). After installing Mojave a few days ago I noticed that the laptop's battery has been raining faster than usual. I timed it and the battery drops about 1% every 4 or 5 minutes. That was not the case before the update to Mojave. As an example. I turned the laptop on at 09:00AM with the battery at 100%. It's now 9:25AM the battery is at 94%.
The work load has not changed. I'm using the same apps I normally use: Chrome, PS, LR, Skype. Nothing out of the ordinary.
My girlfriend has the same exact laptop running Mac OS Sierra, with the very similar work load and she doesn't have this problem.
My guess is that Mojave's got a bug that's causing the battery to drain faster than usual. Hopefully the Engineers at Apple with hear about this problem and release a patch soon.
As it's now I can't use my laptop without plugging it up to electricity. This is very frustrating.
Thanks.
ps. If Apple need I'm willing to share usage and system reports to help debug this thing.