Powerology Thunderamp 30000mAh Power Bank - With its high 30000mAh battery capacity, it provides your smartphones, tablets, and other digital devices with uninterrupted power for days. Thanks to its powerful fast charging technology, it restores your gadgets` energy in the shortest time and with maximum efficiency. Multiple output ports allow you to charge several different devices simultaneously in a safe manner. The durable housing material and ergonomic construction make it highly reliable for long-distance travel and camping. The built-in multi-level protection system fully safeguards connected equipment from overvoltage, overheating, and short circuits.