System-S Backup Battery Charger Extender For Kyocera K493LC K494 K494LC K494NC K494XLC K7 K7 Rave K9 K9 Rave KE414 KE413 KE413C KE414C KE423 KE423C KE424 KE424C KE433 KE433C KE434 KE434C Koi KWC-21335 KWC-2235 KX1 KX1i KX2 KX413 KX414 KX424 KX433 KX434 Insert four conventional 1,5V Mignon AA size batteries into the pack and have a portable power source Total Total running running time with connected battery adapter will be extended for hours (depending on the used batteries up to 8 hours) runnconnecg with a ac adapter or charging cradle Charges your battery or provide backup power Lightweight , slim and compact size