Battery weight

[Randy bryant]

I purchased 3 liperior 6s 6000mah 75c batteries they weigh 1057g is that too much for my f18 90mm

[xviper]

The more important question might be, “Will it balance in the plane in the space available”? If it’ll balance at the recommended CG, it will likely fly but may take a bit more runway to get in the air and it might land a bit faster.