Yuming 3 I have an iPhone X, which has 2700mAh battery, it has only 70% capacity so it is 1900mAh now. This product can only charge my iPhone X from 50% to full twice. Which means this product has at most 2000mAh, far far lower than its 5000mAh claim. Don’t buy it if you expect a 5000 mAh very portable battery.On the other hand if you only need a 2000 mAh portable battery, you still can choose this one.