Will the Samsung Fascinate work without a battery? Can I use a Samsung Fascinate with no battery powered only by the power cable?

(I'm assuming this is a handset specific question, but let me know if I'm wrong and the answer applies to all Android handsets and I'll edit the question to be more general)
No.  I have another SGS model and it works with no battery for a second, as long as the battery's in when you start it up, but quickly shuts off.