Mechanic might be right about the old battery but is shooting himself in the foot.

Dear Car Talk | Feb 01, 1995
Dear Tom and Ray:
Chuck
TOM: Well, the mechanic is sort of right, Chuck. But it sounds like he went to the Cro-Magnon school of customer relations.
RAY: If the battery was in good condition, they would have been able to recharge it. Since it didn't hold a charge, it probably was near the end of it's lifetime.
TOM: NEAR, but not AT the end of its lifetime until THEY left the key and the radio on for a week. So even though your daughter would have needed a new battery soon, she needed it sooner because of their mistake. So I think they do owe her something.
RAY: What they should have done is offer to pay for part of the new battery. They could have given it to her at their cost, or at 20% or 25% off. They wouldn't have lost any money on it, they would have taken responsibility for their mistake, and your daughter would have been a satisfied customer, and perhaps would have come back to them some day.
TOM: Now, she's not only avoiding the place herself, but she's told you how bad they were, you've told us, and my brother is about to take out a full page ad about these guys in USA Today.
Chuck
TOM: Well, the mechanic is sort of right, Chuck. But it sounds like he went to the Cro-Magnon school of customer relations.
RAY: If the battery was in good condition, they would have been able to recharge it. Since it didn't hold a charge, it probably was near the end of it's lifetime.
TOM: NEAR, but not AT the end of its lifetime until THEY left the key and the radio on for a week. So even though your daughter would have needed a new battery soon, she needed it sooner because of their mistake. So I think they do owe her something.
RAY: What they should have done is offer to pay for part of the new battery. They could have given it to her at their cost, or at 20% or 25% off. They wouldn't have lost any money on it, they would have taken responsibility for their mistake, and your daughter would have been a satisfied customer, and perhaps would have come back to them some day.
TOM: Now, she's not only avoiding the place herself, but she's told you how bad they were, you've told us, and my brother is about to take out a full page ad about these guys in USA Today.
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