Auxiliary external battery with hand warmer function, made of aluminium. Features an ON/OFF button on the front that activates a pleasant heating effect with 3 intensity modes. 4000mAh. Type-C input and output connection – cable included – and USB output for charging any device. Type-C input/output: 5V DC – 2.4A1. USB output: 5V DC – 2.4A. The capacities shown for all our auxiliary external batteries are accurate, with all models incorporating grade A, non-recycled batteries, offering a lifespan of at least 500 charge cycles, and conforming to CE regulations. Additionally, they are manufactured in accordance with RoHS standards and comply with the following safety requirements: Power bank overload protection system; complete discharge protection system, increasing the power bank’s durability; locking system to prevent short-circuits; constant charge transfer system in accordance with the target device’s capacity.