... ): built-in Lithium polymer (2,800mAh) Mode of operation: Touch screen keypad E-book: ANSI, Unicode TXT, Doc, PDF, HTML, FB2 ... 3tag) album, song title, and artist File browse: list Others: show photos and listen music at the same time Shutdown: (auto ... shutdown) off, 3, 5, 10, 15, and 20mins Screen refresh: full screen refresh and partial refresh With calendar and G-sensor ...