Mauricio, I've seen CR2032 battery holders with a retainer, a small springy piece of metal with a tiny screw/hole. You need a jeweler's screwdriver to change the battery but it never falls out. Cheers _______________________________________________ http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist