External auxiliary battery with a high charging capacity - 10,000 mAh - and a durable aluminium body. With dual USB and Type C outputs for charging three devices simultaneously and 1 Type C input connection. Charging status LEDs, extra slim design and large branding surface, especially recommended for laser engraving. 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.