GP Batteries GP15AU - C4 Standard Alkaline AA Batteries GP Ultra Alkaline battery is especially formulated to meet the increasing demands of today s new generation of high power devices such as; PDAs, Digital Cameras, Remote Controlled Toys, Audio and other portable devices alike. Best for: MD, CD Players; PDAs; Remote Controlled Toys; Portable Devices. Help boost sales by purchasing a counter unit point of sale display stand to display these and up to 9 different GP battery carded lines. Also known as - 15AU, LR6, X91, AA