Hi s3r1k,
Welcome to Sony Community!
May I know what is the exact model name and the current operating system of your VAIO duo 13? Are you getting an error message or is there a red "x" on the battery?
Here are the troubleshooting steps to follow:
1. Make sure that the drivers are up to date.
2. Search for VAIO Control Center
3. Click the Power and Battery option on the left side of the screen.
4. In the Battery section, click the Details button.
5. In the Battery screen, click the Off/On button to either enable (Turn On) or disable (Turn Off) the Battery Care.
6. Reboot the computer.
We kindly recommend visiting our Sony Global Web site for information on contacting the Sony Support Center in your region at http://www.sony.net/SonyInfo/Support/.
I hope this helps.
Regards,
Jen
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