Anker 3-in-1 Power Bank 5000mAh Built-in Cable 30W USB-C Charger Plug for iPhone
Anker Power Bank has a battery capacity of 5,000mAh. Due to efficiency losses in the conversion circuit, its rated capacity at 5V is about 3,000mAh. Therefore, it is normal for the product to lose about 3% of power per minute during use.