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Hi All, I have an older hardwired Audio Technica Pro 7A LAV that I was hoping to use for occasional public speaking gigs ; in emergencies when wireless is a problem. It runs with a hard-wired single AA battery pack. My issue is that AA batteries are no longer fitting into the battery compartment - the battery (brand new Duracell) is too long and therefore too tight to get into the receptacle. I'm afraid to force it in and cause damage. I could swear that when I first got the mic a AA would fit without any issues. Have they started making these current AA's a bit longer? Inside the compartment it indicates a "UM-3" battery, a Japanese AA equivalent? Maybe there's a slight difference in the dimension/length? Thanks for any tips - much appreciated. Have a great day! Cheers, Dave