Flashing red and green while charging ?

[Twitter@Firas_MD]

Since yesterday I noticed something wrong with my phone, while charging I get an alternative red\ green light and I'm not sure what's wrong.
I'm using the official charger that came out in the box and I'm running the dev preview OS.

 

[TheBluesOne]

It may be due to low power voltage or you might have loose plugged the charger in the socket. I too experienced it once. After removing and reconnecting the charger, the charging went fine.

 

[Dung D Pham]

Phone getting too hot may cause the problem, I experienced it many times before (I was playing games while charging).

 

[oliverr871]

When the temperature has reached a certain threshold it will flash green and red due to overheating.

 

[silkychoco 2013]

it may be charger problem