They are branded "Eveready" don't know the actual manufacturer. BTW, the one that I bought March 2010 that has resided in three different 95 Camrys before landing in my 05 back in January? It started showing signs of going weak Friday, gave me some fits over the weekend, and after stopping off at Sam's Club two hours ago, it tested with a bad cell, so it got replaced with a brand new Group 24F. Sam's Club now carries "Duracell" branded batteries, no clue who manufactures them under that label for Sam's.