Turn off the laptop, unplug any accessories, and unplug the power adaptor. If a battery won't charge, if a battery can't be detected by the laptop, or if there are other power issues, there are some simple steps that can be taken. A faulty battery may lose significantly more charge than a battery in good, working condition. However, some models will lose charge faster than others. It's normal for a battery to lose some amount of charge over time when the laptop is off and unplugged from power.
