What voltage are the servos rated for?
What was the end of charge voltage of the Battery?
Generally, the "goo" indicates that a very high current condition existed.
(Not to mention the smoke)
It's quite possible that servos rated at say 5 to 6V saw a higher voltage, and the internal capacitors blew, resulting in the "goo",
and a high current short. It may be possible to dissect a servo that has some goo around it, and check for vented/blown capacitors.
It's even possible that replacing the bad capacitors might repair the servo(s).
It's also possible that the shorted components reduced the voltage and confined the damage.
Last edited by chuckk2; 09-17-2013 at 07:55 PM.