Semi-Perfect Cell is the result of Imperfect Cell absorbing Android 17. In this stage of evolution, Semi-Perfect Cell is stronger, faster and more powerful. Cell is much bulkier and more humanoid in appearance than his Imperfect form.
In the English dub version of the Dragon Ball Z anime by Funimation, Semi-Perfect Cell is voiced by Dameon Clarke.
In an alternate English dub by the Ocean Group, Semi-Perfect Cell is voiced by Dale Wilson.
In the video gamea Dragon Ball: Raging Blast, Tenkaichi Tag Team and Raging Blast 2 Semi-Perfect Cell is voiced by Travis Willingham.