Default [Q] Weird blinking battery screen

Whenever my phone is powered off and plugged in, it does this weird blinky thing. The battery charging screen shows up, then blinks every 5ish seconds. Anyone know why?

I'm currently running DU, with furnace kernel version 1.3.5. Could it be a kernel issues? Overheating?

Here's what it looks like:">" type="application/x-shockwave-flash" width="425" height="350">