How long does you battery last if you are running on just the battery? If you can run for aboout 2.5 to three hours, your battery is in good shape. WiFi drains a battery more rapidly. It will not hurt to run it down to 5% and then fully charge it again. At that point, take the battery out and store it in the refrigerator. I do use a ziplock. Remember to install it and run it down every month or so. 
My Computer
At a glance
Windows 7 Ultimate 32 bitIntel(R) Pentium(R) 4 CPU 3.00GHz2.50 GB RAMNVIDIA GeForce 7600 GS
- Computer Manufacturer/Model Number
- Home built
- OS
- Windows 7 Ultimate 32 bit
- CPU
- Intel(R) Pentium(R) 4 CPU 3.00GHz
- Motherboard
- ASUS P4P800-VM Motherboard Chipset: Intel 865G + ICH5
- Memory
- 2.50 GB RAM
- Graphics Card(s)
- NVIDIA GeForce 7600 GS
- Sound Card
- SoundMax Integrated Digital Audio (Chip)
- Monitor(s) Displays
- ViewSonic VX 1962 wm
- Screen Resolution
- 1680 X 1050
- Hard Drives
- Seagate Barracuda 7200.10 80 GB
ST380215A ATA Device 18.6 GB
Western Digital "My Book" external hard drive 750 GB
- Cooling
- Fan based
- Keyboard
- Microsoft Comfort Curve Keyboard 2000 v10 USB
- Mouse
- Logitec optic USB
- Internet Speed
- 3.01 Mb/s download 0.64 Mb/s upload
