How do you replace the battery? Is there a trick to opening the back? I tried a flathead screwdriver but had no luck.

Thank you for responding. Fingernail did not work, but the round end of a spoon did. Be careful not to nick yourself.

Hello! There's no trick. The back panel should just open with your fingernail. Please reach out to us at reviews@weberstephen.com, and we'll be happy to help. Thanks!