Why is my phone randomly flashing a red light?

[AC Question]

Why is my phone randomly flashing red light

I've recently noticed that my HTC desire 816 sometimes flashes red led light once or twice. I don't see a pattern, it happens randomly and I barely notice it with the corner of my eye. (Mostly happens when I put it away) my battery level is normal. Last night I was in the dark so I turned my screen of (I was going to sleep) and I noticed the light. No new notifications. Nothing.
what could be causing this and of course, how can I fix this?
Thanks

 

[Golfdriver97]

Re: Why is my phone randomly flashing red light

According to the HTC website, it's when the battery reaches a low level: HTC Desire 816 - Notification LED - GETTING STARTED - How-tos - Support | HTC United Kingdom

What level was your battery when you noticed it?

Edit: Forgot to say, Welcome to the forums!