Fights evenly with someone about as strong as him who could sense his energy but not vice versa

Suddenly, the androids zipped towards Vegeta at full speed, their lack of energy making it hard to follow their movements.

...

The pudgy android 19 let out a chilling mechanical laugh as he crouched into a fighting stance. From the look of his body type he clearly wasn't a fighter, yet the pose he entered was one familiar to several watching, including Gohan—his father often used it. Vegeta also recognized the stance. Apparently Gero had thoroughly studied Goku's fighting techniques and included the data in his android's memory banks.

"Come on, Vegeta," 19 boasted, "You talk big, but I punch harder."

"Oh, is that a fact?" the prince replied. "Well, by all means, don't hold back."

With a shrill of laughter, android 19 charged wildly at the prince. The robot's first blow was cocked almost from the start, a hard right hook calculated with the appropriate strength to severely injure Vegeta. The prince never even uncrossed his arms.

TSSSHHHH. Vegeta vanished right as the blow passed through his blurred afterimage.

19's sensors began to beep, tracking the light speed movements of his opponent. "Hyuhyuhyuhyu! Where are you, Vegeta?" the droid cried out in a sing-song voice.

"Right behind you, clown."

The droid swung his left arm behind him, which also hit nothing but air.

"So, heehee, you're pretty fast. Well, I'm faster, Vegeta!"

19 dashed upwards, chasing after the prince, who still had yet to uncross his arms. A left jab, missed. A right kick, dodged. A flurry of uppercuts and strikes continued to rain down, and the Saiyan prince remained untouched.

'Hmmm,' observed android 20, 'It appears that Vegeta's strength is much higher than I originally calculated. No matter, he will soon make a mistake. That is the genius of the absorption model.'

Appearing quite bored, Vegeta landed on the ground in front of the pudgy droid. "So, is this it? Is THIS the terrible power of the terrible androids? I've never been so underwhelmed."

"So you say, Vegeta, but you see…I know all of your moves. You'll never even touch me, especially once I use full strength."

"Oh, so you do have more strength? And here I thought I specifically told you not to hold back."

...

The pudgy pale android, designated #19, smiled at the taunts. His original calculations hadn't been accurate. Vegeta was far stronger than Dr. Gero had expected. Nonetheless, his sensors were monitoring the prince's energy output and his algorithms continued to assure him of victory. However, he would need to use maximum power to be absolutely certain of success.

Instantly, the droid activated his maximum power stores, all the while charging at Vegeta. This time, with his speed greatly increased, his right fist connected squarely with Vegeta's jaw.

BLAM! The prince was knocked back, but he only stumbled backwards two steps. While somewhat effective, the punch wasn't nearly powerful enough to topple the prince of all Saiyans.

"Hee-hee," giggled the plump android.

The punch had drawn a small trickle of blood from his cheek, but the smile on the prince's face showed no fear. "Ow. I'm just writhing in pain," he mocked. Vegeta lifted his clean white glove to his mouth and wiped the streak of red from his face. "You're no warrior, android…and as such, you're a waste of my time."

"Oh?" 19 smiled.

Vegeta took off into the sky, his normal blue aura surrounding him. When he stopped, a few hundred feet in the air, he began cupping his hands to his right side. "Time to send you to the scrap heap! Let's see how your pitiful junkyard body handles my GALIC GUN! HAAA!"

Quite familiar with the technique, the diabolical Dr. Gero grinned ever so slyly. 'Ah, the first mistake.'

The brilliant purple beam of energy gushed out of his outstretched hands. Vegeta didn't even smile, his beam rushing towards the android below. Suddenly, 19 smiled sadistically and reached his hands upward—revealing two red bulbs in the palms of his hands. Instantly, the Galic Gun was sucked into the android's body. 19 began to glow, the purple energy pulsing through him as his design radiated with new power.

"Aahahahahahaha!" yelled the android as he sucked the last bit of Vegeta's attack away.

...

"So, it appears as though you DO know a few tricks after all." Vegeta smiled, provoking the interest of android 20, who had expected a different reaction. Nonetheless, 20 explained.

"Do you see now, fool? We can absorb your own energy and use it against you. You have NO CHANCE!" the android leader boasted loudly.

Vegeta only laughed harder. "Hahahaha." He had nearly forgotten the thrill of humiliating his opponents and proving his superiority at every turn.

"Now you will die, Vegeta." The machine's voice was high-pitched and nauseating.

"Hah! Your pitiful power wasn't enough to challenge me, so you've resorted to cheap tricks like stealing my energy. How amusing."

The android grinned wickedly. "You will find that my power is nothing to laugh at, Vegeta. Your unwise attack has charged my batteries beyond what I could have ever anticipated!"

Vegeta continued to smirk. 'Pitiful,' he thought. 'Clearly, this pile of nuts and bolts has no actual instinct for battle. If my Galic Gun was the greatest power the machine has ever felt, it ought to be more cautious.'

Its eyes wide and wild, android 19 charged, this time much faster than before. Vegeta sidestepped the first blow, but the robot spun quickly and landed a solid kick the Saiyan's lower back. The prince went sprawling onto his chest.

"Hyah!" 19's tone was exultant. It followed up its advantage, but Vegeta rolled onto his back and braced himself against the ground with his hands. THUFFFF! He kicked up, straight into his opponent's gut.

The android went spinning upward, clearly surprised by the blow. Even with the added power of the Galic Gun it had absorbed, Vegeta was proving to be a far more serious opponent than anticipated.

In moments, the prince of Saiyans was upon him again, launching a fierce flurry of blows. But the chubby robot was using its new power well. It blocked Vegeta's attacks with minimal effort and then countered, knocking the Saiyan back. The two traded blows furiously.

Vegeta's attacks were powerful and decisive, delivering maximum damage with the least possible effort. In contrast, the robot's movements were mechanical and awkward, yet still managed to perfectly counter Vegeta's techniques. Gero's research had prepared the machine well.

"HURK!" A low jab from 19, enhanced with overcharged speed, caught Vegeta, doubling him over. THUMM! A quick double fist to the Saiyan's upper back sent him plummeting to the ground, raising a cloud of dust.

The android descended as Vegeta rose to his feet stiffly, brushing the dust from his armor and cape. The prince grinned, ready to unleash his inner death. "So, you think you've got your victory all calculated out? Haha. I wonder, though…do your predictions have any margin of error allotted for dealing with Super Saiyans?"

- Bringer of Death Chapter 35