I have been searching for a good while now for this for you and have found that it is not replaceable. Once that battery wears out in your unit it is impossible to replace, it is hard wired into the device and no replacement batteries exist.
You can buy a complete replacement for less than $58 shipped if you wish, if you absolutely need one with a working original battery this appears to be the only choice:
Answers & Comments
I have been searching for a good while now for this for you and have found that it is not replaceable. Once that battery wears out in your unit it is impossible to replace, it is hard wired into the device and no replacement batteries exist.
You can buy a complete replacement for less than $58 shipped if you wish, if you absolutely need one with a working original battery this appears to be the only choice:
http://www.amazon.com/gp/redirect.html?ie=UTF8&location=http%3A%2F%2Fwww.amazon.com%2Fgp%2Foffer-listing%2FB000BO4RMC%3Fie%3DUTF8%26ref_%3Ddp_olp_used%26condition%3Dused&tag=dependascient-20&linkCode=ur2&camp=1789&creative=390957
Thanks, let me know if you have any questions or concerns, just reply to my answer here and I will be right back with you.
Tim
That price is lower, but they have been out of stock on the item for well over a year there at geeks.com....
I agree though, this is definitely not a well supported item.
Thanks