43796 Views Previous 1 2 Next 22 Replies Latest reply: Jan 16, 2009 8:54 PM by Matt Chach Go to original post
My macbook pro is 2-3 years old. My battery takes a while to charge and then once charged will only last 40 minutes.
I looked at the power info and under health info, it only has 112 cycles, but under condition it says check battery. When I turn the computer over and push the battery button, all lights are illuminated. When I unplug the computer the computer indicates it only has 68 minutes of charge.
I reset the SMC, but that did not help.
Do I need to replace the battery?
Thanks to anyone with suggestions
This is what my computer says for the battery:
Does this help?
Serial Number: Sony-ASMB012-3503-28af
Device name: ASMB012
Pack Lot Code: 0003
PCB Lot Code: 0000
Firmware Version: 102a
Hardware Revision: 0400
Cell Revision: 0303
Charge remaining (mAh): 1878
Fully charged: Yes
Full charge capacity (mAh): 1878
Cycle count: 112
Condition: Check battery
Battery Installed: Yes
Amperage (mA): 0
Voltage (mV): 12462
Looks like you have a very bad battery.
Depending on your actual model and battery, you should have in excess of 5,000 mAh Full Charge Capacity. Yours is 1,800 - very weak. Mine died at 3,400.
You only have 112 cycles, a reasonable life is certainly over 200, and maybe 300.
I think you have a good case for a replacement - best bet to get this achieved is to go to a Genius bar in an Apple store and smile nicely!
I think I may have a bad battery. I have had it a little over 2 years now. I do have AppleCare and here are the stats for my battery:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 2292
Remaining Capacity (mAh): 2148
Amperage (mA): 591
Voltage (mV): 12568
Cycle Count: 301
It seems that 300 is the magic number and I am going to be frustrated if I am over the limit by 1 or 2 cycles. Would having AppleCare make a difference in getting the battery replaced even though it may have just been through it's normal "life time"?
Unfortunately, once you get to around 300 cycles, it's tough to make any kind of a case for a free replacement, whether or not you have Applecare, and especially after 2 years. You're at the point where your battery's performance would be expected to decline as the battery wears out. Sometimes people get lucky and their batteries last longer, but it's not something you can count on. I just don't think that Apple would be inclined to consider a battery that lasted for two years and 300 cycles to be defective.
Does anyone know if having your computer plugged in most of the time diminishes the battery's ability to hold a charge?
My battery/ computer is a year old. It has gone through only 40 cycles. I have been having trouble with the computer shutting off randomly after being unplugged for about 45 minutes to an hour.
I called apple, they said to calibrate the battery, which I can't do since I can't deplete the battery. The computer shuts off after 45 minutes then won't turn on unless I plug it in.
Earlier today my battery said it had 5330 capacity. Now all of a sudden it says 2259. I'm going to have to have a chat with apple again. I was just wondering if having it plugged in frequently could be the culprit. I do a lot of highly draining activities(video editing, watching dvd's, web video) so I am often tethered.