Here are some examples to help you get started. You are free to re-use or modify them as needed to fit your needs.
Simple Battery Cell Metadata
Metadata for a simple CR2032 coin cell. Also includes exercises for understanding Linked Data basics and fetching additional information from the Wikidata knowledge graph.
Custom Battery Cell Metadata
Metadata for custom R2032 coin cells with different materials. Also includes exercises for filtering data from the graph and querying the PubChem API.