Detroit-based Bollinger Motors has about 30 days to go before revealing its all-electric vehicles, the B1 sport-utility and the B2 pickup. A month seems like soon enough to start teasing the new versions of the utilitarian EVs, which is why the company has released a video that shows the work that’s going into getting the fully operational, proof-of-concept vehicles ready for their upcoming public debut, which will happen near Detroit on September 26.