MacBook air 2015 question

[bnmcj1]

The time remaining indicator is based on minute-to-minute power demands of your MBA, which change constantly. It is not a reliable indicator of battery life. There are dozens of processes running, in addition to screen brightness, Wi-Fi, Bluetooth and other settings, all of which can affect battery life far more than the amount of RAM you have installed.

Yes, and because my daily use pattern is exactly the same, and because I have had several MacBooks, I can tell from experience that more ram = bad battery life.

 

[motrek]

Yes, and because my daily use pattern is exactly the same, and because I have had several MacBooks, I can tell from experience that more ram = bad battery life.

This is selective memory. You use a machine with more memory, notice that once in a while it has less battery life, and chalk it up to the additional memory.

Idle power consumption for LPDDR3 is on the oder of ~21 mW for an extra 4GB:

http://www.freescale.com/files/training/doc/dwf/DWF13_AMF_ENT_T1070.pdf

That translates to an extra 3.18 minutes of battery life on a 13" MBA.

 

[GGJstudios]

Yes, and because my daily use pattern is exactly the same, and because I have had several MacBooks, I can tell from experience that more ram = bad battery life.

Your "gut instinct", unscientific observations or opinion may be sufficient for you, but there is no reliable factual evidence to support your claim.

 

[ET iPhone Home]

So I got a free replacement 2015 MacBook air for my 2014 and I'm noticing huge battery life difference

2014 4gb ram 120gb SSD core i5 (22 charge cycles)

2015 8gb ram 256 GB core i7 ( 5 charge cycles)

I used to get around 10-12 hours on my 2014 I usually get around 8-9 hours on the core i7 with similar usage is this because of the larger processor?

That's not the one for $1199 2015 MBA, is it? Did you have to configure that 2015 MBA with those specs or is that how it came? I'm debating on a rMB or 2015 MBA.

 

[Airboy1466]

That's not the one for $1199 2015 MBA, is it? Did you have to configure that 2015 MBA with those specs or is that how it came? I'm debating on a rMB or 2015 MBA.

I didn't have to pay for it was a free replacement for my 2014 so I honestly wouldn't know the price but It would depend on your usage I chose the mba because more bang for my buck 8gb of ram an i7 and larger SSD vs 4gb of ram and an i5 with a 128 GB SSD I don't really care about the retina screen MacBook Air screen is still nice to me

 

[Airboy1466]

How did you discover that?

Called apple care ran the hardware test and it clearly stated that the batter needed replacement

Reference code: PPT004

 

[Anand953]

Its pointless to count on the remaining hours indicator to measure your battery life. If you really want to measure the true battery life then do that by keeping note of the actual run time between two successive charging to 100%.

Do note that Wifi, Bluetooth and online video streaming etc will consume more battery life. The claims by Apple of 10 hrs or 12 hrs is purely based on continuous web browsing or video watching..