... 18650 lithium-ion batteries packed, 4000mAh/4400mAh/4800mAh/5200mAh available Mobile Power bank with 4400mAh capacity Two 18650 lithium-ion batteries ... , Overload, Short-circuit protection.4. Applications: charging for iPhone/iPad, Mobile, MP3/MP4, GPS, PSP, E-book, MID etc5. Working Temperature: - ... 1A9. Cycle life: :≥500 times10. Warranty:one year from delivery Mobile Power bank with 4400mAh capacity