Maybe you lost your charger or suddenly stopped working. Usually when this happens we will panic. Usually its hard to find a reasonably priced high quality charger... this charger wont warm up your laptop Its about the quality of all the highest performance replacement charger on the market！Fits Mac model:A1278/A1181/A1184/A1344/A1330/A1342 /A1435compatible with MacBook Pro 17 inch:MacBook Pro（17-inch， Mid 2012）MacBook Pro（17-inch，Late 2011）MacBook Pro（17-inch， Early 2011）MacBook Pro（17-inch，Mid 2010）compatible with MacBook Pro 15 inch:MacBook Pro（15-inch， Mid 2012）MacBook Pro（15-inch，Late 2011）MacBook Pro（15-inch， Early 2011）MacBook Pro（15-inch，Mid 2010）compatible with MacBook/MacBook Pro 13 inch:MacBook Pro（13-inch， Mid 2012）MacBook Pro（13-inch，Late 2011）MacBook Pro（13-inch， Early 2011）MacBook Pro（13-inch，Mid 2010）MacBook(13-inch Mid 2009)MacBook(13-inch Early 2009)MacBook(13-inch Late 2008)MacBook(13-inch Early 2008)MacBook(13-inch Late 2007)MacBook(13-inch Mid 2007)MacBook(13-inch Late 2006)helpful tips:-Put it at a dry and cold place when charging.-Do not use the charger with wrong mac model.Any problems Please feel free to contact us Your satisfaction is most important to us!