Another MBA i5 Battery query

Mac Elvis

macrumors newbie
Original poster
May 20, 2012
26
0
I realise there is quite a few posts on this forum and online generally regarding the MBA's battery life however just wanted to ask a specific question which I haven't seen covered anywhere.

I close the lid and leave it in sleep mode overnight and when I wake the MBA has lost around 1% of battery life if any which is great. However after a min or two of opening up Chrome, Mac for Twiiter and checking emails its lost around 4-5%.

Is this normal as its a bit of a drop considering its hardly lost any juice overnight and may take 30-40mins to lose that under normal circumstances.

I have click for flash engaged within Chrome which I'm happy about and so far I reckon the first charge, (onto 2nd since purchase early this week) lasted around 6-7hrs which was great considering I was downloading and on it loads.

I assume this may have something to do with the surge of opening up the applications has on the battery until things level out?
 
Last edited:

JasonR

macrumors 6502a
Nov 11, 2008
958
1
Actually, opening the lid drains the battery 4% every time you open it. Adjusting the lid will also penalize you 2%.

DON'T TOUCH THE LID!!! :eek:
 

Mac Elvis

macrumors newbie
Original poster
May 20, 2012
26
0
Actually, opening the lid drains the battery 4% every time you open it. Adjusting the lid will also penalize you 2%.

DON'T TOUCH THE LID!!! :eek:
Are you being serious? Just downloaded Coconut and its saying my refurbished MBA is 16 weeks old, according to the age of the battery.

Its saying its maximum charge is 6509 mAh with a design capacity of 6700 mAh. With Chrome only open Battery power usage is 6.6 watts. Is this normal?

Regards
 
Last edited:

DollaTwentyFive

macrumors 6502a
Nov 11, 2010
747
4
Parts Unknown
I realise there is quite a few posts on this forum and online generally regarding the MBA's battery life however just wanted to ask a specific question which I haven't seen covered anywhere.

I close the lid and leave it in sleep mode overnight and when I wake the MBA has lost around 1% of battery life if any which is great. However after a min or two of opening up Chrome, Mac for Twiiter and checking emails its lost around 4-5%.

Is this normal as its a bit of a drop considering its hardly lost any juice overnight and may take 30-40mins to lose that under normal circumstances.

I have click for flash engaged within Chrome which I'm happy about and so far I reckon the first charge, (onto 2nd since purchase early this week) lasted around 6-7hrs which was great considering I was downloading and on it loads.

I assume this may have something to do with the surge of opening up the applications has on the battery until things level out?
Could it possibly be losing more than 1% overnight, but it takes that few minutes of use for the battery meter to adjust and reflect properly? I know when I first take it off the charger, the battery meter says "calculating.". Perhaps this is happening in the background and only after a few minutes is it showing accurate battery percentage.

Just a thought.
 

Mac Elvis

macrumors newbie
Original poster
May 20, 2012
26
0
Could it possibly be losing more than 1% overnight, but it takes that few minutes of use for the battery meter to adjust and reflect properly? I know when I first take it off the charger, the battery meter says "calculating.". Perhaps this is happening in the background and only after a few minutes is it showing accurate battery percentage.

Just a thought.
Could be. Think all this is normal tbh from a little further research. Does your battery show a similar drop though following waking it up from sleep i.e opening the lid?
 

TheRealDamager

macrumors 65816
Jan 5, 2011
1,043
11
It sounds normal. You'll drive yourself nuts if you start checking it constantly - just use it as you want and if there's a battery issue before your warranty expires, have Apple address then.
 

Mac Elvis

macrumors newbie
Original poster
May 20, 2012
26
0
It sounds normal. You'll drive yourself nuts if you start checking it constantly - just use it as you want and if there's a battery issue before your warranty expires, have Apple address then.
Agreed, I do think it sounds normal after further research. Cheers.

----------

I haven't actually checked. Let me do some testing and get back to you.
I think you may have been spot on with the MBA taking a few mins to calculate. No need to go to the trouble of checking as it seems normal in any event. Thanks anyway.
 

DollaTwentyFive

macrumors 6502a
Nov 11, 2010
747
4
Parts Unknown
Agreed, I do think it sounds normal after further research. Cheers.

----------



I think you may have been spot on with the MBA taking a few mins to calculate. No need to go to the trouble of checking as it seems normal in any event. Thanks anyway.
Seems normal. I had the MBA sleeping and I woke it up and in the first 5 minutes, it dropped 4%. I think it just takes a bit to calculate. May also have something to do with battery warming up as the CPU generates heat, etc...
 

JasonR

macrumors 6502a
Nov 11, 2008
958
1
Are you being serious? Just downloaded Coconut and its saying my refurbished MBA is 16 weeks old, according to the age of the battery.

Its saying its maximum charge is 6509 mAh with a design capacity of 6700 mAh. With Chrome only open Battery power usage is 6.6 watts. Is this normal?

Regards
No I was being completely ridiculous. Sorry!
 

Mac Elvis

macrumors newbie
Original poster
May 20, 2012
26
0
Seems normal. I had the MBA sleeping and I woke it up and in the first 5 minutes, it dropped 4%. I think it just takes a bit to calculate. May also have something to do with battery warming up as the CPU generates heat, etc...
Great, cheers mate. Really appreciate you taking the time to look at this for me. Looking around online, although there isn't anything specific on it, putting bits and pieces of info together it does appear normal. Bit of a newbie anxiety question I think:D

Thanks again.

----------

Do you have Bluetooth on?
Bluetooth disabled but the few percent drain appears normal anyway. Thanks.
 

KPOM

macrumors G5
Oct 23, 2010
14,552
3,103
When you close the lid and leave it idle overnight, it drops into "deep sleep" mode after about 70 minutes. That's why it loses so little power. In my experience it's about 2-3%, though.
 

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