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Hot New MBP battery

Message #1 - Posted 2008/06/14 - Danny Thompson

A couple of months ago Apple replaced my 18-month old MacBook Pro battery for free under their battery replacement scheme. At the time I was only getting about an hour-and-a-half from the battery.

The relevant thread is there:

<http://groups.google.co.uk/group/uk.comp.sys.mac/browse_thread/thread/4 8eddd1a02016c6b/50191f5efebe1747?hl=en&lnk=gst&q=battery+danny#50191f5ef ebe1747>

I'm not happy with the replacement battery though.

Unlike the old one it runs *extremely* hot all the time. SMC FanControl reports it as between 81-88 degrees C. That's under no real load at all - with the machine idling, and nothing running to speak of.

I'm getting about an hour's battery life.

Activity Monitor shows nothing unusual.

Propping the back of the MBP up with a pencil or similar to increase ventilation makes bugger all difference.

But when I take the battery out the temperature drops to 60-70 degrees C within about 10 seconds.

I'd never experienced temperatures like these with the old battery. With that one the fans barely used to activate. Now they are on *all* the time.

Coconut Battery reports it as having 93% of original capacity, but 38 load cycles after only two months. This is probably a result of the fact that I keep having to remove the damn thing - something I'd *never* had to do before.

Before I call Apple can others tell me whether these temperatures are "normal"?

Oh - MBP 15" 2.16 Intel Core 2 Duo. 2Gb. 10.5.3

Thanks

Danny

Message #2 - Posted 2008/06/14 - Woody

Danny Thompson wrote:

I'm not happy with the replacement battery though.

Unlike the old one it runs *extremely* hot all the time. SMC FanControl reports it as between 81-88 degrees C. That's under no real load at all - with the machine idling, and nothing running to speak of.

Ahh.. from the title I thought you meant it looked really good!

I'm getting about an hour's battery life.

Well, that is wrong.

Activity Monitor shows nothing unusual.

Propping the back of the MBP up with a pencil or similar to increase ventilation makes bugger all difference.

But when I take the battery out the temperature drops to 60-70 degrees C within about 10 seconds.

I downloaded SMC fan control, and my MBP is currently running at 51 degrees, acording to it. Acording to iStat pro, I have:

CPU 51
GPU 45
gpu heatsink 48
heatsink a 47
heatsink b 40
base 29
mem controller 47
mem bank a1 57

If I take the battery out there is no noticable change

I'd never experienced temperatures like these with the old battery. With that one the fans barely used to activate. Now they are on *all* the time.

Coconut Battery reports it as having 93% of original capacity, but 38 load cycles after only two months. This is probably a result of the fact that I keep having to remove the damn thing - something I'd *never* had to do before.

Before I call Apple can others tell me whether these temperatures are "normal"?

Much lower than that.

Oh - MBP 15" 2.16 Intel Core 2 Duo. 2Gb. 10.5.3

MBP 15" 2.3 intel core 2 duo. 2GB. 10.5.3

Woody

www.alienrat.com

Message #3 - Posted 2008/06/14 - Danny Thompson

Woody wrote:

Danny Thompson wrote:

snip

Before I call Apple can others tell me whether these temperatures are "normal"?

Much lower than that.

Thanks Woody. That's really helpful.

Danny

Message #4 - Posted 2008/06/14 - zoara

Woody wrote:

Danny Thompson wrote:

I'm not happy with the replacement battery though.

Unlike the old one it runs *extremely* hot all the time. SMC FanControl reports it as between 81-88 degrees C. That's under no real load at all - with the machine idling, and nothing running to speak of.

Ahh.. from the title I thought you meant it looked really good!

I thought similar!

I downloaded SMC fan control, and my MBP is currently running at 51 degrees, acording to it. Acording to iStat pro, I have:

CPU 51
GPU 45
gpu heatsink 48
heatsink a 47
heatsink b 40
base 29
mem controller 47
mem bank a1 57

iStat Menus now shows the battery temperature, which on mine (idle-ish, recently woken, but with a few CPU-sucking apps running) is 30 deg. The rest is:

CPU 51
Enclosure bottom 31
GPU 41
gpu heatsink 44
heatsink a 42
heatsink b 36
mem bank a1 41
mem controller 33

SMCFanControl agrees with the CPU reading.

Before I call Apple can others tell me whether these temperatures are "normal"?

Much lower than that.

Yeah, I thought mine was hot running at 78-80 degrees under full load for half an hour or so! That's definitely wrong.

Oh - MBP 15" 2.16 Intel Core 2 Duo. 2Gb. 10.5.3

MBP 15" 2.3 intel core 2 duo. 2GB. 10.5.3

MBP 15" 2.16 C2D 2GB, 10.5.3

-z-

"Ignorance more frequently begets confidence than does knowledge." - Charles Darwin

Message #5 - Posted 2008/06/14 - Andy Hewitt

zoara wrote:

Yeah, I thought mine was hot running at 78-80 degrees under full load for half an hour or so! That's definitely wrong.

Oh - MBP 15" 2.16 Intel Core 2 Duo. 2Gb. 10.5.3

MBP 15" 2.3 intel core 2 duo. 2GB. 10.5.3

MBP 15" 2.16 C2D 2GB, 10.5.3

My plain MB is runnignat about 30deg, but that's on the power adapter. In any case, I would have thought 80deg was very high for any battery.

Message #6 - Posted 2008/06/14 - Flavio Matani

Andy Hewitt wrote:

zoara wrote:

Yeah, I thought mine was hot running at 78-80 degrees under full load for half an hour or so! That's definitely wrong.

Oh - MBP 15" 2.16 Intel Core 2 Duo. 2Gb. 10.5.3

MBP 15" 2.3 intel core 2 duo. 2GB. 10.5.3

MBP 15" 2.16 C2D 2GB, 10.5.3

My plain MB is runnignat about 30deg, but that's on the power adapter. In any case, I would have thought 80deg was very high for any battery.

Taking the power adapter out, refreshing about 20 tabs in two browsers and similar, iStat Menus gives me 31 degrees on the battery after five minutes or so of this. 80 on idle is not right.

flavio matani
guitar tuition
homepage.mac.com/flavio_matani/guitar/ www.livejournal.com/users/flavius_m/

Message #7 - Posted 2008/06/15 - Pd

Danny Thompson wrote:

I'm not happy with the replacement battery though.

Unlike the old one it runs *extremely* hot all the time. SMC FanControl reports it as between 81-88 degrees C.

Mine's around 45 C.

It ran quite hot (70-80∞C) for the first couple of months I had it, but I was doing quite a lot of video editing. Now that I'm doing more general and less CPU & graphics intensive stuff, generally seems to run at around 40-50∞C

Oh - MBP 15" 2.16 Intel Core 2 Duo. 2Gb. 10.5.3

MBP 17" 2.6GHz C2D 4GB 10.5.3

Pd

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