Tenergy T-9280 Portable battery Pack (Li-Ion Power Pack) for cell phones, iPods, iPhone, PSP --- SALE! Power up and charge digital devices such as mobile phone, iPod, iPhone, Mp3, Mp4, PDA and PSP Portable games devices. USB charging function Short-circuit protection design Over-Charge, over-discharge protection Included 8 detachable DC plug for cell phone, MP3, MP4, PDA, PSP, GPS devices