What does this icon mean?

[stresstool]

This icon appeared on my S6 recently. What does it mean?

For some reason the forum won't let me paste a screenshot, so I put it HERE

It's the shape of a little battery with a triangle in the middle of it. Is it telling me I need to replace the battery? There is nothing I can see in any of the settings that would make that more clear.

Thanks in advance.

 

[SpookDroid]

That's battery saving mode. Check if you activated any of those settings
Not sure if this is outdated, but it should give you a good idea on where to find it.
https://forums.androidcentral.com/e...port%2Fanswer%2FANS00040905%2F&token=LQVXvhHC