... could be used as back up power for a lot of devices and provide two output voltages at same time,(the ... , mobile phone, iPOD, iPhone, PSP, PMP, MP3, MP4,DVR, portable DVD, pocket mini projector, PDA, walkie talkie, Illumination lighting, karaoke player ... power charging laptop , camcorder, mobile phone, MP3, MP4,DVR, portable DVD, pocket mini projector, PDA, walkie