TP-LINK's TL-PB10400 is a portable charger that allows you to charge devices like smartphones or tablets on the go. The powerful 10,400 mAh battery provides enough energy for 3 to 5 full charges for your devices, ensuring that your smartphone or tablet stays powered around the clock. The TL-PB10400 guarantees charging performance in no time. With two USB ports (5V/2A and 5V/1A), you can simultaneously power two devices such as smartphones or tablets. Afterwards, the TL-PB10400 can be recharged using a power adapter (5V/2A, not included in the package). Reliable power supply features such as short circuit protection, overvoltage protection, overcurrent protection, overcharge protection, deep discharge protection, and overheating protection ensure safe and reliable charging of your device. The TL-PB10400 minimizes unnecessary energy loss during charging, achieving an energy efficiency rate of up to 90%. This means you can power your smartphone 3-5 times with a single charge from the power bank. Integrated flashlight: The built-in flashlight serves as a practical and powerful aid in the dark. Informative LED display: 4 LED lights act as a signal strength indicator, providing information about the battery or charging status.