Bluetooth stereo Adaptor fpr Phonak Exelia/Naida

I am looking for bluetooth adaptors for my future Exelia Hearing aids and i want to be sure if the adaptor can charge as its in use ?

anybody have experience with it or heard about if they can play and charge same time , i found some adaptors as these

http://www.advancedmp3players.co.uk/shop/Accessories.7/Speakers.16/ibluon.260/BT-TD03/iBluon_Bluetooth_Stereo_Audio_Transmitter.2441.html

http://www.datakits.co.uk/store/motorola-ht820-dc800-stereo-bluetooth-headset-music-adapter-p-1332.html

Regards Heinz