As of my last knowledge update in September 2021, the voltage rating of typical thin-film solid-state lithium batteries is generally in the range of 3.0 to 3.7 volts. This voltage range is similar to traditional lithium-ion batteries that use liquid electrolytes. However, it's important to note that battery technology is continuously evolving, and there might have been developments or advancements in solid-state battery technology since then that could have impacted voltage ratings.
For the most accurate and up-to-date information on thin-film solid-state lithium battery voltage ratings, I recommend checking with manufacturers, research institutions, or technical publications that specialize in battery technology.