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Power banks

Power banks, from slim magnetic models that snap onto an iPhone to 20,000–40,000 mAh units with USB-C Power Delivery output of 100 W and more for laptops. Many charge wirelessly via Qi2 and MagSafe or have a built-in cable or stand, and some sets add a solar panel. Filter by capacity, output power, number of ports and weight; brands include Belkin, Sandberg, Epico, Xiaomi and Viking.