- With a massive 27,000 mAh capacity, this Sandberg power bank can keep your gadgets powered up for days- Its five foldable solar panels mean you can recharge in the sun - perfect for beach days or camping trips- Charge multiple devices at once using USB ports, or use wireless charging for a fuss-free boost- The clear LED display lets you know the battery levels and charging status- Its built-in flashlight comes in handy when you're outdoors after dark- Thanks to its IP54 rating, it can handle splashes and dust without a worry