“Toyota says a Prius battery will last between 100,000-150,000 miles or between 8-10 years”
I’ve yet to find an actual Toyota site that says that. If we add ‘at least’ after ‘last’, then maybe it’s correct.
What I did find was the WARRANTY coverage period, which is more the minimum one should expect:
" Hybrid-Related Component Coverage: Hybrid-related components, including the hybrid battery, battery control module, hybrid control module and inverter with converter, are covered for 8 years/100,000 miles. The hybrid battery may have longer coverage under the Emissions Coverage. Refer to your Owner’s Warranty Information booklet for details. Starting with the 2020 model year, every hybrid battery warranty is being increased from 8 years or 100,000 miles, to 10 years from date of first use, or 150,000 miles whichever comes first."