Hello,

I'm using E800 propulsion system with a 6s lipo battery. But the 6 ESCs won't increase to their max rpm. If I only increase one motor's thrust, it can reach, say 100% of its rpm. But if I increase 6 of them at once, it stops abruptly at about 70% of their thrust. The video is here:

E800's one ESC is 20A, total = 120A, and my battery is 12,000mah and 30 C, so totall is 360A. It obviously not because of battery unless it's a bad one. When I solder the ESC power lines, it was a little messy because I wasn't good at soldering. Can the soldering matter? But it works at low rpm and works well for a couple of motors together(up to their high rpm). Can there be anyother reason?

You need to adjust the weight balance of the aircraft, it seems like the battery is too heavy so the aircraft flip over to one side.