I just had a pretty good scare. My bass wasnt working at all. I took out the old battery and put in a newer one. This didnt fix the problem, so I took the input jack off and check out the guts to make sure everything was soldered together. All appeared fine. I take another battery. One that I only bought a few days ago for something else and put it in and now she works just fine. This leads me to my question. The 1st batter I tried was still in the package, just been sitting around (in the freezer for 3-4 months). I didnt think it would be dead if not used. Anyone have a rough idea of what the shelf life of these are? It was an engergizer.