Bests & Worsts Reviews from Amazon

Expiration date is 2019. Installed them today (May 2017) and every single one was chirping in my smoke detectors. Put back the old Duracell store bought and the chirping stopped until I can get to the store to buy batteries. The Procell's are good as AAA, AA, C, and D but for some reason the 9V are always garbage. This happened to me before, but I had to try a second time. Buyer beware for smoke detector use.