Is there any danger to using a cell phone WITHOUT a batter cover?

[You're Playing With Fire]

My phone's battery cover snapped (it's really cheap plastic) so now the battery is out in the open. Is this dangerous at all?

The battery is tightly secured in so it won't fall out.
Battery*****

 

[sleens793]

The battery could fall out and it will get very hot if you use the phone for a long period of time.