Product DetailsProduct Details Features4,000 mAh, solar rechargeable, external auxiliary battery. In resistant aluminum material, with USB output and including micro USB cable. Available in a wide range of colours. 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. Size7.8 x 12.5 x 1.4 cm MaterialsAluminium Decoration size5.5 x 1 cm Decoration methodLaser Engrave 2, Pad Print 2 Decoration positionBottom of the main face Shipping InformationShipping Information Product packingBoxed Carton quantity50 Carton size22 x 32 x 44 cm Carton weight9.5 kg