DB Chapter 344
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
"The Androids Unhinged" (うろたえる人造人間, Urotaeru Jinzōningen; Literally meaning "The Artificial Humans Lose Their Cool") is chapter 344 of the Dragon Ball manga.
No. 20 can't believe this, as Vegeta walks up to No. 19. "What's wrong? Did your junk dolls calculations prove to be wrong?" No. 19 hops back to his feet and flies at Vegeta, but Vegeta ducks it, then kicks No. 19 up into the air. Vegeta flies up after him, blocks a grab from No. 19, and then punches No. 19 in the face. No. 19 appears to have a nosebleed from the punch, and Vegeta asks if that's blood, or oil? No. 19 shoots eye lasers at him, but Vegeta dodges and appears behind him, knocking No. 19 down into the ground. No. 19 hits hard, creating a huge crater. Vegeta lands down in the crater, where No. 19 looks passed out. But No. 19 suddenly jolts up, grabs Vegeta's wrists, and screams that he won't let go until he's absorbed all of Vegeta's energy. Vegeta likes the sound of never, and uses his feet to push on No. 19's face, noting how they absorb energy and add it to their own. Vegeta keeps pushing on No. 19's face, until No. 19's hands break off.
Vegeta looks at a broken off hand, noticing a spot on the palm for absorption. Then he throws both hands to the ground and says there'll be no more absorbing, and notices No. 19 looking scared. "So even artificial humans feel fear..." No. 19 climbs out of the crater and then runs away, and No. 20 gets pissed. Vegeta tells No. 20 they'll fight after he finishes up this one. Vegeta takes to the air, and starts powering up. Holding his hand out with the palm facing out, he says, "Take this!! This is Super Vegeta's Big Bang Attack!!!" And he fires a huge ball of ki that hits No. 19 and causes a tremendous explosion. When the smoke clears, there's nothing left but No. 19's head. No. 20 says, "Clearly our calculations were off... But, all the same, you have absolutely no chance of victory...!" Vegeta just smirks.