carnival lights flashing on my controller?

Hey guys,

Need some help with my controller. I've had my 360 since the 7th of this month. No problems at all, still no problems. But something that I noticed yesterday when I was playing Gears of War (and Bioshock) is that about every 3-5 minutes the lights on my controller all start circling, from 1player-4player's lights. I call it a carnival, because that's what it looks like. Is this a sign that there's a problem with my controller? I have completely no idea as to why it does it. It doesn't seem to do anything except flash like that, and it isn't messing up my controls. Anyone have this weird thing happen to them? If so, what does it mean? [By the way, I looked through the 360 manual, and it doesn't mention anything like what I'm getting]

Thanks.

its only a dying battery(but i've been able to play for days with the lights going).Metalhero1

I had a thought it may be that, even though my batteries still have 2/4s power left. Thanks for helping me out, I appreciate it!