This page on Google Nest Help itemizes what you get for a Google Nest Battery Camera with and without a Nest Aware subscription:
Thanks for the help you provided, @MplsCustomer! I appreciate your help.
@Tim33 - You can use your Nest Cameras and Doorbells without a Nest Aware subscription, but you would not have any of the features that come with Nest Aware like saving clips, facial recognition, etc. You will simply have a live view of the camera instead. If you are interested in signing up for Nest Aware, you can find out more information here.
Please let me know if you need further assistance.