External auxiliary battery made in a combination of bamboo and wheat straw. With 4,500 mAh charging capacity and an original cylindrical design. With Type C input/output connector + USB output. Presented in an individual box of eco design in kraft cardboard.Materials such as bamboo encourage the use of natural raw materials, reducing pollutant emissions. It comes from a highly resistant and versatile plant with rapid growth and regeneration, making of it an excellent alternative to traditional wood.Wheat straw promotes the use of natural raw materials, thus reducing pollutant emissions.The capacities shown in all our external auxiliary batteries are real, all of them incorporating non-recycled, grade A batteries, with a service life of at least 500 charging cycles, and complying with CE regulations. In addition, they are manufactured according RoHS standards, and in compliance with the following safety requirements: Power bank overcharge protection system. Complete discharge protection system, which increases the durability of the power bank. Blocking system to prevent short circuits. Constant charging transfer system, in accordance with the capacity of the target device.