Portable energy bank - REMAX Revolution RPL-58. With a large capacity of 20,000 mAh it allows you to charge devices multiple times. The dual USB port allows you to charge up to two devices at the same time. Made of high quality components - ABS and PC, ensures long-term and safe use. Two USB ports allow you to charge up to two devices at the same time. High capacity (20,000 mAh) allows you to charge devices multiple times. Equipped with ventilation slots, thanks to which it does not heat easily. Classic design makes the product look extremely elegant with a smartphone. Specification: Battery: 20,000 mAh Materials: ABS + PC Input: DC5V / 1A Output: DC5V / 1A NOTE! Nominal capacity expressed in mAh (milliampere hours) means the sum of all cells that were used in the power bank. The cells used have a voltage of 3.6 - 3.7V, while the standard USB port - 5V, so voltage conversion is necessary, which in turn translates into real capacity. After conversion, it is usually around 65-67% of the original value. This means that for a power bank with a capacity of 12,000 mAh, in fact about 8,000 mAh is available.