I thought I would let others be aware that I had a problem on my otherwise totally reliable S9 after the recent software update (installed May 3rd 2021). This is labelled as a March 23rd update in the software information.
Immediately after the update, the battery life went from 5 days to 5 hours!! In fact the phone casing became warm to touch because the processor was working so hard. After a lot of messing about with settings and clearing Apps caches (esp. Google play store) I finally fixed it by clearing the cache partition on the boot-up menu (which is not easy if you are not especially tech savvy).
Now 3 days later, batter life and consumption back to old levels. So just be aware if you experience the same problem as me. Neil
I'm sorry to be the bearer of bad news but this is only a temporary fix and it will start to heat up and waste battery again trust me I've done this on 3 s9 devices now and all have returned to there draining state and repeating the cache wipe does not fix it. I've searched and there is a may 2021 update/fix in the us but it hasn't hit the UK yet 😡