iOS 15.1.1 & watchOS 8.1: Fast battery drain from "App Store" app

[mpainesyd (Michael Paine)]

See this Tidbits discussion:

iPhone 8 battery drain, perhaps with iOS 14

The battery drain is definitely associated with wifi. This snapshot of the Battery settings shows (from midway across) discharge with wifi off then, after lunch, the wifi on. The graph is much steeper with wifi on. [image] The start of the graph is also with wifi on, then it moves to charging at night. My guess is that 14.xx introduced some background activity whenever connected to wifi. Maybe artwork for music or similar unwanted downloads is active? I don’t use iCloud for photos or backups…

In particular a recent post “for me, turning off Settings / App Store / Video Autoplay seemed to fix that battery issue…”
This could be your App Store issue. However it did not fully rectify my battery drain.