Contax RTS II Gebrauchsanweisung Seite 9

The camera's electronic shutter and exposure control
systems are battery powered so the battery must be fresh
and correctly inserted if the camera is to function property.
Use a 6.2-V silver oxide battery (Eveready 544, Ucar 544, Maltory
P)Q8 or equivalent) or a 6-V alkaline-manganese battery @LR44
or equivalent).
E
Open the battery compartment cover on camera base by
lifting up cover knob and turning it in direction of arrow.
A
Insert the battery according to polarity diagram shown in the
battery compartment, otherwise the camera will not function
properly. Then replace the cover and turn the knob to firmly
secure the cover.
t o