The affected batteries could overheat, posing a fire hazard to consumers. Apple has received six consumer reports of these batteries overheating. If you have a recalled battery, please stop using it and order a replacement battery immediately. Once you have removed the battery, plug in the AC adapter to power the computer. If you must temporarily use your computer with the battery, do not leave it unattended and check for signs of overheating.
The effected batteries have model numbers A1061, A1078, and A1079 and serial numbers that begin with HQ441 through HQ507 and 3X446 through 3X510.