I followed this guide and big thanks to those who shared the link to purchase a battery. Oddly it did not seem to work right away. I plugged the doorbell once assembled to charge for 15 minutes or so and then installed.

About 24 hours later it just started working again so it was definitely the battery. You will need to get some glue for the cover and do not try and scrape off the foam adhesive. I just used my fingers to pull away any clumps and applied about a q-tip amount of flex seal in certain spots and held together for five minutes .

Battery: 280mAh/3.7V Replacement Battery for Nest C1241290 Vido Doorbell Wired NC5100US Hello 1ICP7/17/26 https://a.co/d/9zXgbXO

Glue: Flex Glue Mini Clear 3 Pack https://a.co/d/7ALQLGh

Doorbell cover: elago Silicone Case Designed for Google Nest Hello Doorbell Cover (Black) - Full Protection, Night Vision Compatible [US Patent Registered] https://a.co/d/fzTB3Lz