Regrettably I no longer own a CC, therefore I cannot show you a close-up of the battery cap. From memory: it's a plastic cover with a metal strip/bar underneath that connects either the plus or the minus (don't remember how the battery goes in) of the battery to two locations (180 degrees apart) on the rim of the hole that the battery goes into.

It should be easy to come up with something (a metal strip or some conductive foil) that closes the electric loop. Then you will have construct some kind of (non-conductive) cover to seal the hole.

You being in Incredible India should not have any problem (?) finding somebody who can concoct something for you if you don't feel like doing it yourself.

Good luck!