How long will a 22,000 mAh rated USB power bank power a USB device requiring 5v - 3w of power? - Quora
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Xiaomi launches Mi HyperSonic power bank with 20,000mAh battery capacity and 50watt fast charging - Times of India
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20,000mAh Power Bank with Dual Type-A Quick Charge™ and Type-C Power Delivery USB ports | Jaycar Electronics
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