Sometimes, the technical term for something is shortened in everyday conversation. If you try to do a keyword search using the slang term or abbreviation, you may not find what you're looking for in the databases!
Be sure to use the full term, even if it's just the first part of a name, to ensure you get the most returns in your search! The database may use "fuel cell" instead of "battery" and vice versa.
Example topic: (Zinc) Silver Oxide Cell Battery Operated Devices and Systems
Keywords to try: Silver Oxide Cell