I use a BH-214 with a cut, melt, and solder battery upgrade from stock 110ma/h to 400ma/h so I have gotten perhaps 16-20 hours of audio out of a charge.
I suspect my BH-214 is a fake but this not 100% copy still works for skip back, skip forward, answer, pause, volume, and doubleclick answer for call last number dialed. The poser button and answer button are wired together so depressing the answer key in a bag will turn on and waste some battery though it will shut off after a bit of being not paired.
Normal 3.5mm audio jack and DIY single headphone made from sony hook over the ear phones or diy short headphone from my ripped Nokia wired headset.

http://talk.maemo.org/showthread.php?t=82500