overcharging

[ranielle]

I left my z1 charging overnight. Would that damage the z1's battery? I have read from other forums that it doesn't matter if lithium based batteries are left charging even after its fully charged. Also, after i have left the phone charging overnight; when i turn the stamina mode on the battery only lasts an extra 2 hours from 100-40% battery and an extra 1 hour from 39% below.

[ajay4084]

I am using xperia z1 and I have read in other sites that "it's not recommended to charge z1 over night. It will affect the battery life and battery life would go shorter". Is it true?
I have never left my z1 on charging for entire night.
And would the green light go off once the battery is fully charged?