This is the lithium version: http://www.bhphotovideo.com/c/search...rch=yes&sts=ta

The Mamiya 7II manual indicates that you can use any of the alternatives - alkaline, silver-oxide or lithium, but in my experience the silver-oxide cells are the most reliable.

I buy mine through eBay - here is a 4-pack example of some that appear to be available to the U.A.E.: http://www.ebay.co.uk/itm/4-x-544-En...item4ac4f4a496