airtag will not close...hands slip to lock Is there a tool I can use?

I have a terrible time with these too - what's worked best for me are those jar-opener aids (thin, flat rubber-like disks). Changing batteries on air tags is very difficult for those of us with hand issues (like nearly all seniors!).

Tried to replace battery 2 different airtags. Won't close or lock with Duracell 2032

Seek assistance at an Apple Store or Authorized Apple Service Center.