It seems like a weird fix to the battery life complaints the new MacBook Pro has been receiving but there is logic behind Apple’s decision to take out the “time remaining” battery life estimate from these machines. According to an internal investigation by Apple, the battery issue isn’t a hardware flaw but more of a prediction inaccuracy of the time the MacBook Pro remains usable. This unreliability issue is seen to be caused by the latest low-power processors and how it switches between tasks. The battery life status menu couldn’t keep up with the CPU when it switches between low-power and high-performance modes, thus causing the erratic predictions.

Another cause seen is the use of iCloud syncing, especially when first using the machine. Some users don’t realize that the process of syncing kicks into overdrive when the new Mac is first set up so it can sync all your data. This works in the background and it’ll greatly affect battery life. It would take a few days for battery life and its estimate to normalize. What Apple has decided to do is just put the percentage of the remaining battery life on the screen.

Source: 9to5Mac