I certainly found it so

Uninstalling Facebook app saves up to 20% of Android battery life: Facebook’s Android app negatively impacts performance and battery life, even when it’s only running in the background, users find

Frustrated by having to charge my Samsung Galaxy S5's battery by noon in order to have any juice by evening and preventing the phone from shutting itself down by dinnertime, I removed Facebook, Messenger, and a few other applications that I was using infrequently. The results? At the vvery least about 30%-50% or more battery at bedtime, and not having to charge during the day at all. I can still check social media through my Chrome browser. I rarely used Messenger, anyway, and it was a space hog as well. In fact, now that I removed those applications and backed up my photos from my SD card to the computer, I now have about a fourth of my internal storage and half of my SD card free again (several of the applications were partly stored on the SD card). And things are opening a lot faster. Yay!