Thanks for the tip, I will get in touch with Cameras Underwater and pursue the matter with them. You are right, this problem has gone on for some time, it's not even if I use the camera that often - we only have one dive holiday a year. Other than that it's all above the level of the ocean! And they certainly should have a long record of my complaints!

Re the battery, I've had a look in the travel case and there isn't a specific battery-case (unlike the one you describe) but fortunately I had a spare plastic container in which the SD memory chip came and this fits the battery OK. Thanks!