MECH: First of all, you need a new battery.
ME: But you guys already put in a new battery.
MECH: No we didn't.
ME: Well, that battery right there is not the battery I came in with. Possibly someone other than you put the new battery in, but nonetheless, a new battery has recently been installed in my car, not by me.
MECH: Oh. Okay. I see here that we did install a new battery. But it is dead.
ME: So you'll replace it for free, right? Because it's new?
MECH: No. We can recharge it, but not replace it. You didn't ask for a warantee.
ME: I was not offered the opportunity to do so.
MECH: At any rate, you need a new battery. You must have done something to run down the battery.
ME: I don't think I did.
MECH: Did you (reads off lengthy list of things that I might have done to drain the battery)?
MECH: Well, anyway, you need a new battery. Also, you need to replace the alternator.
ME: I see. And, can I ask, why didn't you check the alternator when I had the car in last week?
MECH: We did. It was fine then. Sometimes components just quit on you.
ME: So you're saying that between the time I left here and the time I got home from here 15 minutes later, the alternator and the battery died? Because I haven't been anywhere in this car since you fixed it last week.
MECH: Apparently, yes.
ME: Quite a coincidence.
MECH: It happens.
ME: Well, what's the damage going to be?
ME: Four hundred and forty dollars? For an alternator and my second new battery in as many weeks?
MECH: Well, plus tax.
ME: I see.
MECH: And service fees.
ME: Service fees.
MECH: And of course the cost of towing you over here.
ME: I drove myself over here.
MECH: Good! You saved yourself $75. Also, you really should think about those brake repairs we talked about last week.
ME: I have thought about them.
MECH: So your grand total would be, say, $720.
ME: Quite a packet.
ME: In addition to the $1500 I gave you last week.
ME: Since which time I have driven the car a total of 3 miles.
ME: Close to what I could buy a whole new engine for, that total.
ME: Also, $170 for a new battery seems a bit steep, seeing as I could buy one myself for a third of that and install it for free.
MECH: If you want to give up the professional workmanship, sure.
ME: Would this be the professional workmanship observable in your having sold me a product last week which lasted all of six days and then died, and which you couldn't remember having installed?
MECH: Er, yes.
ME: And for you to just charge the battery, that would be free, right?
ME: Let's go with that one for now.