This is for the original discontinued lithium battery rechargeable LED version of the remote. If you are OK updating to the non-LED version which uses AAA batteries. You can purchase them here for $129.

https://www.adjustablebedremotes.com/#!/Reverie-8T-9T-RC-WM-110-or-Personal-Comfort-Flex-9-Wireless-Remote-with-Lumbar-Feature/p/173335555