Sony VAIO VGN-Z500 Series - Manual (Page 182)

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Troubleshooting
Battery
How do I find the battery charging status?
See Charging the Battery Pack (page 27) .
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 level falls below 10%.
❑ When both the charge and power indicators 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 wear level, see To check the battery wear level (page 29) .