Damaged batteries should be treated as hazardous materials. Do not return the device if the battery is swelling, leaking, or if you in any other way suspect that the battery is damaged. In this case, please document it with a picture or a video. Include your order number and serial number (found on the device) in the photo or video.
Make sure you dispose of or recycle the reMarkable and its accessories according to local laws and regulations. Do not puncture, drop or incinerate the battery.