If the camera only has contacts at one end of the battery
compartment this would require a serious lash-up.
Not really, I think.
AFAIK, CRV3 are a tiny bit longer than AAs. All one would have to
do is stick/glue/... some thin sheet of metal onto the battery
compartment door in the correct places.
Now that is sneaky
But it might be that the camera will not operate with the lower
voltage, eventhough it physically would fit.
That was something which occurred to me. IF the translated Chinese
is correct that the "the fuselage with special batteries and
single-use batteries can handle three CR-V3 batteries."
Then it may have a higher operating voltage I can see two Liions in
paralell or 3 CRVs in series. Which would be what ~ 10V ?
If it needs 6V not 4.8 (which is what you get from 4x NiMH) then
that would be a good reason NOT to say runs on AA ....