A side-by-side (SBS) mod places the atomizer beside the battery instead of on top. The result is a shorter, more pocketable setup that still accommodates a full-sized 22-24mm RTA or RDA.

SBS mods are popular with MTL and restricted-DL vapers who want a compact daily carry without sacrificing atomizer choice. Most 22mm RTAs sit flush on an SBS deck with no overhang.