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donl1150

macrumors newbie
Original poster
Why does my MacBook Air lose all of its battery charge during the night, while unplugged? The battery is BRAND NEW, from OWC. The Energy Saver settings are: Computer sleep: 10 minutes; Display sleep: 10 minutes. There was 58% charge left last night when I put the computer to sleep. This morning?? - Dead, 0%, nothing, nada. Any thoughts?
 
What does it say when you go to the apple menu and choose About thie Mac > More Info > System Report > Power > Battery Information?
 
Here is the current info:

Battery Information:



Model Information:

Serial Number:W01107AW7D3BA

Manufacturer:Newer Tech

Device Name:A1405

Pack Lot Code:3230

PCB Lot Code:30db

Firmware Version:ddae

Hardware Revision:dac2

Cell Revision:2b39

Charge Information:

Charge Remaining (mAh):2380

Fully Charged:No

Charging:No

Full Charge Capacity (mAh):7335

Health Information:

Cycle Count:3

Condition:Normal

Battery Installed:Yes

Amperage (mA):-3361

Voltage (mV):7517



System Power Settings:



AC Power:

System Sleep Timer (Minutes):10

Disk Sleep Timer (Minutes):10

Display Sleep Timer (Minutes):3

Wake on AC Change:No

Wake on Clamshell Open:Yes

Wake on LAN:Yes

DarkWakeBackgroundTasks:1

Display Sleep Uses Dim:Yes

Hibernate Mode:3

PrioritizeNetworkReachabilityOverSleep:0

Standby Delay:4200

Standby Enabled:1

Battery Power:

System Sleep Timer (Minutes):12

Disk Sleep Timer (Minutes):10

Display Sleep Timer (Minutes):12

Wake on AC Change:No

Wake on Clamshell Open:Yes

Current Power Source:Yes

DarkWakeBackgroundTasks:0

Display Sleep Uses Dim:Yes

Hibernate Mode:3

Reduce Brightness:Yes

Standby Delay:4200

Standby Enabled:1
 
open terminal and paste this:

cat /var/log/system.log | grep -i "wake reason"


Then it will give reasons why the computer wakes during sleep.
Google what each response means and how to go about resolving it.
Note I'm not a real terminal user by a long shot, I just went through the same thing, and was instructed to do what I put above, and it helped. Now instead of losing 45% overnight, it looses about 8-10%from a full charge from after work around 6pm until 8 am the next day.

Good luck.
Brad

ps mine was giving a code of uhc2 I think, which led me to do a lot of resets and re did all my printer set ups.
 
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