I have good luck with Walgreen's and CVS brand alkaline batteries in anything I have used them for thus far. Sometimes, the batteries on sale at both these drugstores are labeled "heavy duty." While okay for an emergency, batteries labeled that way are *not alkaline, and do not last as long regardless of where they are used. Mike Duke, Director Radio Reading Service of Mississippi 601-432-6301 mike.duke@xxxxxxxxxxxxx www.mpbonline.org