I tried it and it was conclusive. It is well worth the price I paid. I can not comment on the length of life, but I think it will hold the 300 announced by Apple to charge its batteries. The best conditions, the range is between 3 and 4 o'clock 30, max Os X. As I always WiFi and Bluetooth turned on permanently, I easily, on ~ 3h 2h OsX 10.68 and 30 ~ on Ubuntu 11.04. I have a MacBook2.1, black, late 2006. I added 4GB of RAM and a 500GB Samsung disk for use mainly on Ubuntu 64. I'm pretty much a load a day, life expectancy, 1 ~ year, if you remove the battery at home to limit the number of dependents. Shift-I to 141 charges and the max is announced by coconut 3838mAh against 5200mAh original. 26% less. I do not have too regenerated. I'll try a little regeneration; here may improve things. We must limit the charge / discharge to lengthen the life of the battery by connecting to the mains as soon as there was a power outlet nearby. This is my method. Even if it is 100% charged, I leave connected. By cons, with battery of new technology, there is no memory problem, you can load as many times as you want without reaching the maximum load. If I have improved after using the Apple regeneration method, I will tell you. @ +!