Power Bank aluminum 4000 mAh. USB output.Micro USB input

External auxiliary battery of 4.000 mAh made of aluminum. With USB output and Micro USB input. LED charging status indicators and Micro USB charging cable included. The capacities shown on all our external auxiliary batteries are real, incorporating all grade A and non-recycled batteries, with a useful life of at least 500 charge cycles and in compliance with CE regulations. Additionally, they are manufactured in compliance with RoHS standards and meet the following safety requirements: Power bank overload protection system. Deep discharge protection system that provides greater power bank durability. Locking system to prevent short circuits. Constant load transfer system, in accordance with the capacity of the destination device. Micro USB input: 5V DC 1A USB output: 5V DC 1A 4000mAh. USB output.Micro USB Aluminum Input