My new (1.5 years old) replacement battery from Amazon is coming up as service battery. It really is discharging quickly and I just attributed it to these machines not managing power well. So maybe I got what I paid for. I got it off Amazon from one of the many options. Not the cheapest in go the options but not the most. I remember laboring over the choice and reading reviews. I thought I made a good choice. So maybe it's time to try the OWC NuPower battery for $104 that is often recommended here? That said, I believe Apple will replace it for $129. I can surely handle it, but why not go with Apple for $25 more. Does Apple "condition" it the way OWC reccomends?