Why your 10,000mAh power bank isn’t actually 10,000mAh

Credit: Rita El Khoury / Android Authority If you’ve ever felt slightly cheated by even the best power banks , you’re not alone. At first glance, a 10,000mAh battery pack looks like it should recharge your 5,000mAh flagship phone twice without breaking a sweat. Yet somehow, the numbers never seem to work out quite that neatly.