ebay #390295535875 just put the number in the search window. Also search for "Samsung Continuum battery" and there is even a 3600mah one! I have secured (in hand) a spare cover. So I have one to modify. I'm really considering ordering this sucka' I've posted a request on the Samsung Continuum page here for someone to measure thier battery. I think the prongs look the same. Edit: I notice the tits inside the phone that prevent different batteries from being installed are made of plastic, so the are easily modified or removed.