Also.... the inflation cartridges have a replacement date, you can see this through a plastic window on the front. If you can, dig through the pile to get one with a later date.
After my post I went to look at the owner’s manual to double check my comment re: moving water. Thought it doesn’t mention the air bladder (speculation on my part, sorry), it does say this:
“NOT for whitewater paddling or personal watercraft use. PFDs fitted with an automatic inflator are not permitted for sail boarding activities.”
I hope personal water craft means jet skis not pontoons. Common sense would say don’t use it if getting wet and being submerged is a normal part of what you are doing, movement is restricted once it's inflated.