Hi all. Just wanted to give you a heads up on this situation we had a few days ago. Before starting the flight we checked both batteries, and their connection. Upon the first minutes of flight we suddenly got a huge voltage drop, and landed immediately. What happened was one of the negative leads from the drone to the battery connector came loose. Came loose from its solder inside the plug. It’s impossible to catch this on safety checks, so now we have done new soldering on both our Altas. Luckily this happened while we still had some juice left on our batteries. Check up on those plugs!