I have started using the Button style batteries but the only worry i have with that is that the customer has to carry AA batteries and lithium button batteries if they have multiple machines and i am not sure on how long the Button style batteries will last. I know GTB use them in their system 3 CPU boards but they are a larger style cell.
I have a system 11 and 6 wms machines with them fitted and will see how long they last as a test.
From my experience in the computer industry with BIOS batteries (lithium button) I would be surprised if you didn't get a good 7 to 10 years out of them.
Thanks, but i recently had to replace one that wasn't that old in a pimped / restored scared stiff. But I don't know if the cpu board was removed and the battery was shorted because the board was not stored correctly while the rest of the machine was pimped out.