Sony USER GUIDE V G N - C S 2 0 0 - Manual (Page 144)

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Troubleshooting
Battery
How do I find the battery charging status?
See Charging the Battery Pack (page 25) .
When is my computer using AC power?
When your computer is directly connected to the AC adapter, it uses AC power, even if the battery pack is installed.
When should I recharge the battery pack?
❑ When the battery charge level falls below 10%.
❑ When both the charge and power indicator lights blink.
❑ When you have not used the battery pack for a long period of time.
When should I replace the battery pack?
If the battery pack quickly runs out of power after fully charged, it may be reaching the end of its life and should be replaced.
To check the battery charge capacity, see To check the battery charge capacity (page 27) .