Sony PCG-GRX690P - Manual (Page 21)

Using the Battery
21
Charging a battery
You will need to charge the battery if battery power drops below 10 percent or
you have not used the battery for a long time. The lithium-ion battery supplied
with your computer may be recharged at any time, whether you wait until the
battery is completely or partially discharged. Charging a partially discharged
battery does not affect battery life. If you charge the battery and find that battery
power is still low, the battery may be reaching the end of its life, and you may
need to replace it.
To charge a battery
You can charge the battery when the computer is on or off. However, the battery
will charge faster when the computer is off. Charging the battery takes several
hours. See your VAIO® Computer Specifications on the “Welcome” page for the
approximate time needed to charge your battery.
Battery icon Battery status
Charging
Fully charged
Discharging
No battery
✍
The battery supplied with your computer is not charged at the time of purchase.
✍
Charge the battery at temperatures between 50°F and 80°F (10°C to 30°C). Lower
temperatures require more time to charge.