I'm going stick (perhaps my unwanted) opinion in here FWIW.
We're talking about resurrecting (2) 5 year old batteries which weren't maintained properly from the beginning of their lives.
If I had invested $160 with Warren Buffet 5 years ago...do you have any idea what that money would be worth today? And I wouldn't have to be responsible for the maintenence of that investment!
But, it seems to me that you invested some money in an item which (you were under the mistaken impression would hold its' value and condition) gave you a surprise!
Without being rude, or critical, take your loss (just as you might in the equities market) and go on with your life!
Is another $160-180 going to make the difference as to whether you live or die? Spending more good money after bad is not the way to go. THEY"RE DEAD! And Al Gore and John Kerry lost elections! Live with it!
Hope you have a pleasant day and I hope you have learned from this experience!