4 years later, I finally ran out of replacements CR2s for my Lowes IRIS gear. The batches I bought all had an expiration date of 2020. I ended up needing more, so I found:
Tenergy CR2 (no longer called Propel) 750mAh
10-pack $16.19 ($1.69 ea), 20-pack $28.89 ($1.39 ea)
AmazonBasics CR2 800mAh
12-pack $17.99 ($1.49 ea)
This time I went with 24 of the AmazonBasics.