I just happened to come across a 4-pack of Energizer C-cell alkaline batts in my junk drawer. This is a cell size I almost NEVER use, so I was about to recycle them when I noticed the "best used by" date: Dec. 1999.
Just out of curiosity, I put them on my ZTS MBT-1, and lo and behold they all tested 100%.
I for one was surprised to find they held up so well 9 years past their stamped date. Does anyone know if this is typical?