Nope, no typo: The battery is 7500 mAh. I'll run two 20A motors and 7-8 servos. I'm planning on building a self-designed plane. For the flaps and the ailerons I will need a total of 4 servos, and I'll need another 2 for rudder and elevator. I also think I'll run one controlling only the nose-gear since linking the rudder and nose-gear with the same servo is hard in my opinion. Therefore, I'll need about 7 servos.
Now, the battery weighs 450 grams so yes, it is big, but I figured out that running a single large battery saved me lots of weight compared to two smaller ones.
My own view would be that with two 20 A motors that battery is rather big which can give problems a smaller lighter battery would not.
To carry such a big battery successfully the air frame will have to be sufficiently large and robust which will add more weight. Then 7 servos and their control surfaces will add still more complexity and weight.
The total weight of a plane determines how much power is required to fly so unless your air frame is both structurally and aerodynamically efficient you could find your two 20 A motors will have to work quite hard just to fly.
I am not saying it can't be done but it is a slightly unusual combination.