Does anybody know why my Scubapro/Uwatec Aladin Tec is suddenly running down batteries? Has this been a problem with this computer?

It has been a solid performer for about a year with almost 80 dives on it. I replaced the batteries just before a week-long dive trip in January. I dived once with it in February. I jumped in the water Saturday morning and nothing.

I replaced the battery and it worked fine all day Saturday. When I got in the water on Sunday, the screen was flashing Low Battery. It would not calculate my dive. It only displayed temperature and 21% O2. No timer, depth or dive calculation.