How to tell if my htc one sv is charged??

[timuss]

Bit of a strange one i've just got this on an upgrade and its been on charge for ages. There is no light showing that its on charge. On my old HTC there was a red light on the front when it was on charge but with this new one nothing?

 

[timuss]

Whoops realised what the problem was there, was a piece of plastic that i hadn't taken out. The useless instructions never mentioned that.