Constant Low Battery

Hi,

I've had my Ear Fun Air for just about a year now. Recently I got the  voice saying low battery so I charged my Ear Fun Airs for 2 hours with the light being green. When I put them in I still recieved the voice of low battery and it says on my phone low battery 10%, they then ran out of charge.  I put them on charge again but the light was still green and when I took them out 2 hours later they were still dead.

Is there anything you can do to help?

Thanks,

Alex