May works. But dun put the blame on me if doesn't works.
1) Wrap the old batt in newspaper, follow by put them in a plastic bag and seal it.
2) Put them into the freezer for 3 days.
3) Remove from freezer and place it at room temperature for 1 day.
4) Remove the plastic bag and place it at room temperature for 1 day.
5) Remove newspaper and full charge the batt like it brand new ~ 8hrs.
This can restore the battery lifespan up to 80%.