Thanks G3 for your thorough explanation. A few follow-up questions if I may:
1.) When purchasing a new "green" battery for the 5v PS2 system one doesn't know when the battery was manufactured. If a green battery really is new, does it matter (i.e.; one produced 10 years ago will be as good as one produced 1 year ago because they have a very long shelf life)?
2.) Is the design of the green battery different/better than that of the original white battery?
Thanks,
Tom