The battery on some notebook computers may not indicate a 100% charge in Windows, even when the power adapter is plugged in. The battery may appear to stop charging between 95 percent and 99 percent.
This is normal operation and is designed to extend the life of the battery. Even when the indicator light on the chassis shows the battery fully charged, the battery still receives a trickle charge. The battery stops fully charging and is given a trickle charge so that it does not accidentally get overcharged.
To check battery status, press the battery meter button on each battery. If the battery status does not show 100%, the battery may need to be recalibrated. To locate the instructions for recalibrating a battery, consult relevant notebook documentation.