Curious, how are you working with BVLOS possibilities on doing this type of work? Sounds like it could be very labor and driving intensive, as are you physically going to be driving to each street and watching your drone going on a single linear...
Oh dear, they may be bricked. One should long store lithiums at 50-60%. Completely discharging DJI drone batteries can permanently kill them. I’d charge them back up to full and then use them down to 60% for storage. Hopefully they are OK, and...