Super Electromagnetic Machine Voltes V: Volume 13

Included herein:

S01E25 Self-Destruct!! The Super Electromagnetic Ball!
November 19, 1977 TV Asahi
After collecting some Maxingal fragments from the destroyed beast fighter and doing some tests, Dr. Sakunji found out that super electromagnetic beam can weaken Maxingal strength. To get enough electromagnetic power, Voltes had to gather it from thunder that strikes Voltes' sword, Tenkuu-ken, then Voltes have to throw the energy to the enemy to weaken the Maxingal metal. This way of attack is called "Choudenji Ball" (Super Electromagnetic Ball). The problem arose as Voltes energy became overloaded as the thunders stroke. Once again, the red mechanical eagle came to the rescue, and it dropped a tube containing Voltes mechanical scheme.

S01E26 Combine With the Mysterious Craft
November 26, 1977 TV Asahi
Voltes V underwent a heavy repair according to the mechanical scheme dropped by the mysterious red mechanical eagle. When it tried to fire Choudenji Ball, it turned out that the energy of Voltes V was drained to zero because the energy control of Voltes V failed. Once again, the mechanical eagle came to the rescue. To solve the energy draining problem, the mechanical eagle combined with Voltes by "Panel Seven" mechanism and implanted an energy control device in Voltes' back. Now Voltes can use Choudenji Ball at its disposal.

Remember, all the titles and names are different in the English dubbed version!