Yes it's true, I have changed to the Colkan 15.5 and very happy with it until it died a few days ago. The electronics are on their way back for a stay in hospital
Anyway I blew the cobwebs off the KISS on the weekend and did some 110m cave dives...why did I change??
Must say while the 15.5 was working it was awesome to dive. Certainly did the job in the Pearse Resurgence recently.
Anyway I answered my own questions on the Laguna website about the batteries. Very interesting setup.