I made this post under the:
MyMPxPlayer.org Forum » General Discussion
http://www.mympxplayer.org/viewtopic.php?p=12760#12760
I have seen a 400mAH in Maplians for £9.98
http://www.maplin.co.uk/module.aspx?...8938&doy=14m11
When I get the mp4 player I will check it out and keep you posted. 8-10 hours play time would be worth the money!!!