I have posted a blog entry on a modification to use AA LiFePO4 batteries in the KX3: https://k4lxycw.wixsite.com/blog/blog <https://k4lxycw.wixsite.com/blog/blog> 73 Howard K4LXY Howard Zehr K4LXY Radio blog: https://k4lxycw.wixsite.com/blog/blog Photo gallery: www.howardzehr.com