My macbook air (13-inch, mid 2011) battery drains from ~100% to ~85% over night. The problem only started a few months ago. I'm currently running yosemite, but the problem started while on mavericks. My battery cycle count is ~130.
I tried completely discharging the battery and then re-charging, but that seems to have had no effect. I've also read through apple's battery documentation, but I can't find anything there either. Unfortunately, most of the forum posts I've found are about batteries going from 100% to 1% overnight -- I'm having trouble finding anything about losing ~15% overnight.
Active Profiles: Battery Power 1 AC Power 2* Currently in use: standbydelay 4200 standby 1 womp 1 halfdim 1 hibernatefile /var/vm/sleepimage darkwakes 1 networkoversleep 0 disksleep 10 sleep 10 hibernatemode 3 ttyskeepawake 1 displaysleep 10 acwake 0 lidwake 1
Here are the results of
syslog | grep -i "Wake reason" for the last 24 hours. I put my computer to sleep yesterday around 6pm and woke it this morning at 9:56am. Over that period, the battery went from 100% to 85%.
Nov 18 09:51:00 prime kernel <Notice>: Wake reason: EC.LidOpen (User) Nov 19 09:56:57 prime kernel <Notice>: Wake reason: EC.LidOpen EHC2 (User)