Reviews Vention 10000mAh Power Bank (USB-C + USB-A) with Built-in Cable 22.5W Blue LED Display

Hello, thank you for your review. The capacity stated on the power bank (e.g., 10,000mAh) refers to its internal battery. However, during the charging process itself, there are natural losses due to energy conversion and heat emission. In practice, any power bank can realistically transfer about 65–70% of its rated capacity to a phone. So, out of 10,000mAh, approximately 6,500 to 7,000mAh will actually reach the device. This is a common technical standard based on the laws of physics, which applies to all power banks on the market. You can find more information in our article https://www.alza.cz/kapacita-powerbanky Should you need anything, please do not hesitate to contact us. Thank you and have a nice day, Ondřej - Alza expert