Is Sales Compensation Coming From the Battery Drawer?

My mouse started acting up the other day.  That usually means the batteries are wearing out, so I headed over to the battery drawer for two new batteries. What a mess.  Lots of batteries, that wasn’t the problem. I just had no idea if any of them were any good.  So I did what was necessary, which was try all the various combinations of those batteries until I got something like the performance I needed to make the mouse run again.  But at this rate I have no idea how long it’ll work because I somewhat randomized my chances for success…