New Macbook battery won't hold charge?

Question

I recently bought a new OEM battery from an online reseller for my Core Duo (August 2006) white MacBook. I had it for a few weeks and it worked perfectly (3+ hours of battery life, as opposed to the 7 minutes I had been getting with the original battery, don't perma-charge!), and then it just stopped. If I unplug the AC adapter, it turns off after about a second, and if I start the computer without the adapter, it turns off after about two seconds.
I've tried resetting the SMC and reinstalling the firmware, and the computer still runs off of the old battery (albeit not for very long). I'm having the same problem in my BootCamp install of Windows 7 as well.
Quoth CoconutBattery:
Current Battery Charge: 4259 mAh (98%)
Maximum Battery Charge: 4304 mAh
Current Battery Capacity: 4304 mAh (85%)
Original Battery Capacity: 5020 mAh
Battery-Loadcycles: 22
Age of your Mac: 34 months
Charger connected: Yes
Battery is charging: No
And the Power pane of the System Profiler:
Battery Information:
Model Information:
Serial Number: DP-ASMB013-382a-7d56
Manufacturer: DP
Device name: ASMB013
Pack Lot Code: 0001
PCB Lot Code: 0000
Firmware Version: 0102
Hardware Revision: 0300
Cell Revision: 0100
Charge Information:
Charge remaining (mAh): 4259
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 4304
Health Information:
Cycle count: 22
Condition: Good
Battery Installed: Yes
Amperage (mA): 0
Voltage (mV): 12468
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 5
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 1
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
Charging: No
It seems like other people are having the same problem? Admittedly, it could just be a coincidence and I got a bad battery, but I thought I'd pop in to see before I RMA it.
Message was edited by: eleraama

Answer 1

I don't think the battery is your problem. Here's things to check:
Try using another MagSafe adapter and see if that helps.
Make sure the connectors between the MagSafe adapter & the computer is clean, as well as the connectors between the battery and the computer.
Sounds to me like you have a problem inside the computer and that's why it won't run on battery power.
~Lyssa