3.70V,1100mAh,Li-ion, Replacement Smart Phone Battery for HP iPAQ 500 Series Voice Messenger, iPAQ 510a Voice Messenger, iPAQ 512 Voice Messenger, iPAQ 514 Voice Messenger, iPAQ 518 Voice Messenger, Compatible Part Numbers: 445074-001, 445074-002, 445668-001, 450790-001, FA889AA, HSTNH-K13B