Default XPERIA Z charging...

hi...
i have my new purple xperia Z 4glte... running already at 4.2.2,

i just wana ask how to know if its already fully charge?

because i noticed once it reached its 100% its just said "charged"
is it already full?

im just a long time samsung and htc user which notify that the battery is full and need to unplug same as it notify to green light saying tis fully chrged...

is this the same with sony? how can i know if my phone is on fully charge?
pls hlep... tnx....