[92snowmachine]

you should take your battery to a shop that has the appropriate means of testing it and doesn't have an interest in it either way. pep boys wants the battery to be good so they don't have to warranty it and autozone wants it to be bad so they can sell you their battery. the only proper way to test a battery is with a carbon pile tester. those little handheld electronic testers are useless and often don't give the same results twice in a row on the same battery. they infer the amount of power the battery can put out by drawing a small load watching the drop in voltage and extrapolating that info into larger numbers that batteries are rated in. a carbon pile tester will actually draw however many amps is necessary to do a truly functional test of both the battery output and alternator max charge rate. most shops have these and typically won't charge you to test your battery/alternator.