Where are they getting the batteries?

Electric cars are an extremely simple, mature technology that is decades old. Building one isn't hard. The real trick is high volume production of high capacity lithium ion batteries, and the associated pack technology. This is why the Europeans are still massively behind Japan, Korea, and the US (Tesla) with EVs. They can't get enough cells to manufacture cars in high enough volume to be profitable, because they are simply buying them from LG Chem and Panasonic.

If Turkey isn't investing billions into battery production, then the whole endeavor is a pointless prestige project.