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) As you fill the unit with oil, it will turn on and think it is diving, because you are pushing the oil in and creating pressure. Stop every little while and let the air out. If you push too hard, you will break the new seal from too much internal pressure and you'll have to start re-glueing the cover all over again!! 
Some of them have stopped as you now can't get new battery covers, which made it a LOT easier.But there are some companies who do the replacement.....
I love my Uwatech Aladin Air Z Nitrox, but I really don't like that battery issue.
How about you post a link here or add it to a post as an attachment?? :cool2:I changed the battery last year, it can be done and i made a manual in english so if any one wants it email me and ill send it,
gizfodder@hotmail.com
[snipped] I found out the used 10 times Uwatec Aladin Air Z Nitrox computer I bought from a local diver (had a dead battery) would cost $125 for the wrist/battery and $100 for the transmitter battery to be replaced, unless I was the original owner and then it would be replaced for free for life.[snipped]

Derrick here in Canada - i have a couple of Aladin Air z 02 computers, they are like new but i need to change the batteries and restart the computer, can you help?Well after actually opening my computer (What a nightmare that was!) I have to eat my words and advise the battery in mine has solder tabs, not the axial leads I'm used to with previous Aladin computers. So my suggestion is....use either tabs or axial leaded version. You will probably find tab version easier to come by.
Web page and updated PDF document on the way.....