"#16 Summons His Power" (決死の１６号パワー！！ Kesshi no Jūroku-Gō Pawā!!, lit. "The Desperate No. 16's Power!!") is the one hundred seventy eighth chapter of Dragon Ball Z and the three hundred seventy-second overall chapter of the Dragon Ball manga.
The cover shows a bruised Android 16 standing behind a bruised Android 17 while they're in a battle against Cell.
Having been hit with Android 16's Rocket Punch, Cell flies backwards. As he dashes after his opponent, 16 grabs and reattaches his fist. He punches Cell to the ground, then grabs him and raises him overhead. He angrily throws Cell to the ground, creating a deep hole. Android 17, amazed at this display of power, watches in shock as 16 detaches both of his hands. 16 then unleashes a Hell's Flash into the hole. The attack creates a shockwave, and energy beams fly out of the ground throughout the area. Krillin, still flying to meet Bulma, wonders what has happened. He notes that Piccolo cannot be the cause of this, as his ki is gone.
Meanwhile, Android 16 looks into the hole to see the damage he has done. He reattaches his hands as Tien Shinhan and the other androids continue to stare in shock. 16 notices that Android 18 is still there, and says that he told her to run. 18 says that will not be necessary now that Cell has been defeated, but 16 says she is wrong. He says that Cell, while injured, will not die so easily. He again implores 17 and 18 to escape, but 17 refuses, saying that he wants payback and can now finish a wounded Cell. As 17 taunts Cell to come back out, Cell begins to emerge from the ground behind him. Tien notices Cell's plan and yells out to 17, but Cell quickly emerges and begins to absorb the android with his tail.
16 dashes towards Cell, but stops short, noticing that 17 has already been absorbed whole. Cell then begins to glow and starts to transform, and 16 tells 18 that they are leaving, and tells Tien to do the same. On The Lookout, Goku and Gohan feel a large increase in Cell's ki, and Goku realizes that Cell must have absorbed one of the androids. Cell is shown, grinning, in his new Semi-Perfect form.