External auxiliary battery made from bamboo, with a charging capacity of 2,200 mAh. Easy to carry thanks to its small size, with USB and Type C input and output. Especially designed for laser engraving. Includes Micro USB cable and comes in an attractively designed box. Instruction manual available in Spanish and English. Materials such as bamboo encourage the use of natural raw materials, reducing pollutant emissions. It comes from a highly resilient and versatile plant, with rapid growth and regeneration, making it an excellent alternative to traditional wood. The capacities shown for all our external auxiliary batteries are genuine, all of them featuring grade A, non-recycled batteries, with a lifespan of at least 500 charging cycles and in accordance with CE regulations. Furthermore, they are manufactured in accordance with RoHS standards and comply with the following safety requirements: Overcharge protection system for the power bank. Complete discharge protection system that provides greater durability for the power bank. Locking system to prevent short circuits. Constant charge transfer system, according to the capacity of the target device. 4,000 mAh. USB output. Micro USB input.