Hi Vince,
yes it has 5 channels but the 5th is used only if you want to share the battery with a servo e.g. the throttle.
I'm supersticious and always give the battery it's own connection.
The 555 is a hitec number just like the 425 or 525 servos. Unless now you're gonna tell me that the 525 has 525 oz of torque
Now that would be a servo
Bob