850mAh Li-ion Battery For iRiver H10, H10 6GB, H10 5GB
This battery does not fit it. After several emails  with the company and sending them photos and measurements of the old battery they made me a battery that would fit after a couple months. The old battery.is thin and has a two wire connector.  the one they sent looks like the picture probably fits some portable phone, but it does not fit the Iriver H10 20gig MP3 player.