The fiasco began as I tried to align on 2 bright stars, Vega and Altair. No problem locating Altair, but Vega was under the roofline of a house. I figured I would just get close and align later when the sky got darker. This, of course, caused a slow drift and I was unable to obtain anything more than a 15 second video. I then went back to attempt a second alignment, finished Altair and just as I was about to zero in on Vega both of my telescope drive batteries went dead....imaging session over...nuts!