Swamp Yankee
Well-known member
FWIW... I still use the first electronic tuner I ever owned, a Korg CA-30, that I bought in back in 2004 or so. It takes 2 AAA batteries and they last for years. The ones in it now expired in July 2012 and they still work. I don't think I've changed the batteries more than 3 times in the 14 years I've owned it.