It can store up to 500 contacts in phone memory. Each contact can store up to 9 fields like home number, office number, fax number, birthday, special asssign tone and caller group. It has BP-4L 3.7V 1500mAh battery. It has an operating time as follows: * GSM Talk Time up to: 9.5 hours. * GSM Standby Time up to: 18 days. * WCDMA/3G Talk Time up to: 6.0 hours. * WCDMA/3G Standby Time up to: 17 days. * Video Playback Time up to: 4.5 hours. * Video Recording Time up to: 3.6 hours. * Music Playback Time up to: 40.0 hours.