One out of 4 batteries leaked and corroded a nice LED flashlight. It's ruined because some of the corrosion is between the contact and its connection to the "brains" of the light. No way to clean it out. The negative end of the battery was completely covered in corrosive goo.
I ordered a 20 pack of AAA batteries, what I got was an 8 pack of D batteries. Not happy.
Diehard Alkaline AAA are not good. Made in China, lasted only a few days in a small LED pocket flashlight. Put three more in and lasted another 3-4 days. Before Diehard AAA I used Kodak Alkaline and they lasted on average with the same usage 3 to 4 weeks before I had to change them out. Save your money buy other brands.