Speaking of Facebook, Natasha Lomas, reporting for TechCrunch:

Facebook has confirmed it is investigating reports of excessive battery drain caused by its iOS app apparently continuing to run processes in the background — even with background app refresh disabled.

In a statement provided to TechCrunch a spokesperson for the company confirmed it is investigating the issue, adding that it hopes to be able to put out a fix “soon”.

“We have heard reports of some people experiencing battery issues with our iOS app. We’re looking into this and hope to have a fix in place soon,” the spokesperson said.

Expect a “bug fixes” update soon. That is, if you still have the app installed on your device rather than following Nick Heer’s advice.