2032 Battery you need - amzn.to/44wSP8x
Here is a quick and easy demonstration video on how to replace the battery in your BOSE remote. All you need is your replacement 2032 battery and a coin. I'm using a nickel but any coin will work. Use that to remove the back cover. The new battery will be installed + side facing outward. Put the back cover on and you're all set! I hope you found the video brief and helpful!
How to change the battery in your BOSE remote!
Bose 318809-001 Wireless Infrared Remote Control For Bose Cinemate Series II