Duracell Coppertop AA Alkaline Batteries 24/PK

I tried the cheap versions out there, that claim to have the same power and lasting ability. My Echo wall clock, usually I'd get 9 to 12 months of use with a set of four batteries, using the timer options and such just about every day, and often multiple timers in a day drawing juice. And the other known cheap version out there lasted barely 3 months. So it was back to the ones that work. I used these with my kid's toys growing up as well - never a failure, never an issue, and lasted longer than any others I've tried.