Has anyone bought any batteries from Amazon.com? I searched "Blackberry Battery" and a couple items came up. They were all very cheap but I'm very confused on what is actually being sold.

Amazon.com: BlackBerry C-S2 Battery for 8700c, 7130e, 7100i, 7105t Handsets: Cell Phones & Service

In the title it states that is a CS-2 battery, but the picture and the reviewer says its a CS-1?

Amazon.com: RIM Blackberry Standard OEM Battery for Blackberry 7130g 7130e 7130c: Cell Phones & Service

That doesn't state the model but in the picture it shows it is a CS-2 battery?

I'm looking to buy another battery for my 8703e and Amazon seems to price things very well...but I am confused.

So if anyone has bought from Amazon.com before, help would be appreciated!