Ebay Battery or Name Brand One?

[Sayajin]

Okay guys, I wanted to get your opinion on something.

Despite how everyone is raving about the battery life on the TP2, I still need an extra battery. (Have 3 for the TP1)

I know that the Sedio site just came out with accessories for the TP2 and an extended battery is one of those items. It is $49.99. However on eBay you can find an extended battery for $5.

My question is, I know it used to be that using eBay batteries was dangerous and you ran the risk of damaging your phone. Is it still that way? Do you guys buy the real name brand batteries for your phone? Or do you go ahead and buy the eBay one?

I have to make a decision today as the Sedio discount code expires today! Thanks a lot for the input guys.