inputs.text: must traveler - product saved bunch times world trip 6 months happy made investment used charge olympus stylus tough camera incredible 2 phone constant use battery life holds well phone drains fairly quickly camera good rule thumb 5 charges completely drained battery phone maybe 2 camera not tried charge thehem take pretty long time charge taken pictures camera charging otherwise would completely dead worked pretty welli 2 cons external battery not like fact usb output would nice not convert mini micro etc negative cannot used charged many countries voltage high mainly use external battery would like keep plugged wall time charging devicesoverall must avid tech craver external battery come handy times not