How could i know when the battery charging on my dell inspiron N5010 is full?

[sirclom]

When i plug on AC adaptor the light indicator is steady solid white. How could i know when it is already fully charged?

 

[hang-the-9]

You can't without looking at the battery meter in Windows, some systems have the battery meter flashing as it's charging though, does yours flash when it's bellow 100%?