Rhinowalk Bike Top Tube Bag 1.5L Bike Frame Bag with Magnetic Flap Fully Waterproof and Stable Bicycle Frame Bag Bicycle Bag Professional Cycling Accessories for Mountain Road Bike-XXL

Actually there are two cables which come with it. Short and long. Short one is just right length. I use https://www.amazon.de/dp/B0FF9513Y3?th=1 to keep my power bank. I am using https://eu.ugreen.com/products/25188 and it feeds my GoPro and iPhone for up to 8H.