... 15 hours --shut off scree, then using earphone. Video, 5 hours, E-book is about 7 hoursE-book ... timeaudio(shut off screen and with earphone)about 15hrs video about 5hrs E-book--about 7hrs8Mode of Operationmechanical key ... solution is 4000 x 30000 Image JPEG,BMP,GIF Video WMV,RM,AVI,RMVB,3GP,FLV,MP4,DAT,VOB ... 10M, 15M,20M15OthersUSB PORTMINI USBData transfer2.0USB HOST(USB2.0)hot 5.0 inch e book