Is the battery available outside iRiver? If so, where? Has anyone changes theirs by themselves?
I was only able to find it on aliexpress for $7.86 http://www.aliexpress.com/snapshot/6745429240.html (seller name: weiyu li). It is exactly the same battery, size and markings, as in AK100.
Its very easy to change the battery by your self, iRiver made it very simple.