After Apple announced with great fanfare the extraordinary battery capacity that its little ones in the Mac notebook range have. Many publications have got down to work to see to what extent what Apple affirms so emphatically is real.
The truth is that it seems incredible that a laptop can go up to 12 continuous hours of work even in optimal conditions but the new generation of Intel Haswell chipset has improved consumption appreciably energetic.
On the other hand, we see that there is an increase in the capacity of the battery in this new version, going from 7.3V with 6700mAh in the 13-inch model from 2012 to about 7.6V and 7150mAh in which it is now the current one. Since Engadget We see that they have carried out an analysis of this Macbook Air in particular, exceeding the mark imposed by Apple with 12 hours and 51 minutes of duration, which makes it go spectacular.
Although as you well know, these results differ in reasonable margins According to the hands of the »examiner» through which the unit passes, to this we must add that not all batteries leave the production line equally well with difference scales of up to 10% in capacity from one battery to another so you always have to find a mean between the worst and the best result.
In the Laptopmag test, the Macbook Air reached a mark of 10 hours and 53 minutes being the worst of all the registered by Forbes with a battery life of between 8 and 9 hours, even so it is still long the equipment with greater capacity, surpassing other ultrabooks of direct competition, which have averages of between 6 and 8 hours maximum duration.
More information - The renewed 13-inch Macbook Air falls into the hands of iFixit
Source - Macrumors