Signal &ndash; 16,000 mAh Rechargeable High Power USB Back-Up Battery with 3 Independent 2.4Amp Outputs, Over-Load and Over-Heat Protection Three USB charging ports deliver 2.4 Amps of power simultaneously (Total of 7.2 Amps) for full speed charging on virtually any USB powered device. The only back up battery you will ever need! Protected by our exclusive PowerGuard smart ports that include; Full certifications, overheat protection and overload protection - that shuts down if overheating or overload is detected protecting your devices OnGo 16,000 Rechargeable Battery delivers up to 72 hours of additional talk time and even includes a dual USB cable with both mini and micro USB jacks plus a built-in flashlight and total charge indicator Extra durable with lightweight, solid cast aluminum casing for long life and protection from damage Perfect for powering power hungry tablets, smartphones and even Virtual Reality headsets.