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.