Hmm, intersting as I was reading an old blog post about this a couple of days ago. IT was mainly interested in the MISB side of things though. ANyhoo, I managed to dig out my RID Supreme Primal and Instructions and took some photos.
Lucky I did, as there were signs of leakage.
Oh and it take 3 AAA batteries
Place him face down. The batteries are in the back pack. Release the jets.
With a small philips head screwdriver, there are two screw. The other is on the opposite side.
I found it a little fiddly to get the cover out from under the hhinge.
There they are.
Interesting mine had begun to leak. I think they should be able to be cleaned up though as it wasn't too bad. Odd as I had this cranking not much less than a couple of months ago...
The horrific results...
On the plus side, I managed to get a tooth brush in there and give the compartment a little clean up and he still works fine and dandy. My mum's camera had some batteries that leaked really badly. I thought it was toast, but I got in there with a bit of wet/dry paper and gave the contacts a light sanding, cleaned all the crud out and it came good. Nothing had actually leaked into the electrics at that time though, so they can be cleaned up depending on the amount of leakage.