why does my camera have dc-in?

[Van Hellseek]

There is a socket on my piece of crap camera which says "DC IN 3.4V" and since I'm pretty sure this camera doesn't have a battery charging feature I'm assuming it's for using the camera without batteries - when it's plugged into a mains adapter. Would that be right?

Anyway camera is Olympus FE-120
http://www.olympus.co.uk/consumer/29_FE-120.htm