Even though it is “10,000mAh”, you cannot fully charge your smartphone twice? Pitfalls of large capacity mobile batteries

"mAh (milliampere hour)" is always listed in the product information of mobile batteries. This is a unit that indicates the capacity of a battery. In other words, the higher the number, the more electricity can be stored in the battery, and the more electricity can be charged at once. A mobile that claims 10,000mAh...