New Macbook giving me horrible battery

sn00pie

macrumors 6502a
Original poster
Jun 25, 2008
593
0
United States
Purchased roughly 2-3 weeks ago. According to CocunotBattery i've had 9 cycles, and current battery capacity is 5029 mAh, original capacity = 5020 mAh. Right now its at 80% (4052 mAh) and it's telling me I have 2.04 hours of battery left.

Thats nowhere near the 4.5 hours I'm expected, and I've noticed its running way too hot. CPU A is running at 66 and the Airport Card is at 69, and its been idle for 20 minutes.. btw I bought 3 year AppleCare but I haven't registered it yet...

My brightness is on 20-30%, bluetooth off, wifi on.
 

pjrobertson

macrumors 6502a
Nov 14, 2007
533
4
Funny you should say that. I was just going to post to say how my battery life seems to have shot up after the 10.5.5 update.

After the update I turned on my Mac and realised I had 6 hours battery life!

If you turn Airport off you'll get the 4 hours promised. Changing the brightness from full to ~20% doesn't really make that much difference, you have to turn it all the way off.

My battery has a full charge capacity of 5168mAh after 63 cycles. It sounds like you battery might be duff or you need to recalibrate. Have you done this recently; fully charged your Mac, run the battery all the way down till it turns off. Leave it for 3 hours, then fully charge it again.

See here:

http://support.apple.com/kb/HT1490
 

TEG

macrumors 604
Jan 21, 2002
6,572
49
Langley, Washington
Take it to an Apple Store and have them look at it, it doesn't sound normal.

Then again, the battery life is with, brightness at +1, processor at Reduced Speed, Wi-Fi Off, and Hard Drive set to sleep.

TEG
 

sn00pie

macrumors 6502a
Original poster
Jun 25, 2008
593
0
United States
I just updated to 10.5.5 now and it's saying 58% with 3:30 to go. But I doubt that is a realistic calculation. I'm actually timing it on my watch, so I will have a real number regarding the actual battery life.

I'm at 40% brightness, wifi on, BT is off, no usb devices connected, and the battery was "calibrated" yesterday when I used it from 100% all the way till it put it self to sleep, and I recharged it to 100% and now I'm doing this timing "test" :)

Edit: I don't understand what caused the CPU to get so high when I posted this thread. Maybe cause I had it sitting on my bed? Right now its on my desk and CPU A is at 41 (iStat Pro), compared to 66 at the time of posting this thread.

Good news is it's telling me 2:36 with 53% battery left. Maybe OS X was trying to confuse me into updating it?
 

hogfaninga

macrumors 65816
Aug 16, 2008
1,305
0
Chestnut Tree Cafe
It is weird b/c each Macbook/battery does seem to act differently. I use 90% brightness(I don't see how you guys use 30-60%), wifi always on, and BT on(I have BT mouse. I get about 3-3 1/2 hours on my battery.