E.K.
Unfortunately today's goods are not designed for longevity, they are designed for ease and replacability. Did you know that if you still have a TV with a large back(a CRT~Cathode Ray Tube) once it's gone it's trash. No one makes the part anymore because it is cheaper for them to replace the product than the part. Am iPod, once it's battery dies, you've lost everything and need to replace the iPod, there is no battery to be used or replaced. So I would just chuck them and get new ones, with warranty service plans.