This really is a tuned engine for use with Star-Unit Series releases, and certainly will employ Item 55105 or Tamiya R6/AA/UM3 batteries as a power source. See below for appropriate pinion gears.
Compatible Chassis
SW-01*1 & T3-01*2 Chassis
*1Compatible pinion gear: Item 54228 (26T just). Utilize with Items 54834, 54857 and 54876.
*2Compatible pinion gears: Items 50354 (16T only) and 50355 (18T only). Use with Items 54900 and 54928.
*The formal Tamiya R/C Parts Matching List has an abundance of information regarding framework compatible with Tamiya Spare and Hop-Up Option components.