HP G61 Laptop Battery User Tips:

1. How to keep HP G61 battery healthy?
Laptop battery packs should be charged for 12 hours when you first get them. Laptop batteries are completely discharged at the time of purchase, and need a full charge before their first use.
2. How to Extend the HP G61 Laptop Battery Life
According to statistics, a typical laptop battery last long for 500 charges / discharges cycles. If you want your battery for HP G61 to last longer than this number, remove the battery whenever your laptop is plugged into an outlet. If you leave it in, the AC power could cause the battery to overheat and overcharge. Also, keep in mind that keep your laptop and battery in cool, dry, and well - ventilated locations. Hot environment might minimize the HP G61 Battery life.

HP G61 Battery http://www.dearbattery.co.uk/hp-g61-battery.html
Lenovo ThinkPad Edge 15inch Battery http://www.dearbattery.co.uk/lenovo-thinkpad-edge-15inch-battery.html