The Anker PowerCore Essential 20000 is a basic power bank with a reasonable capacity for multiple charges, but the 15W power output means that larger devices such as laptops are out of the question.

Anker PowerCore is a Qi-certified 10W wireless power ... It is a popular 10000 mAh Power Bank that offers charging speeds of up to 22.5W. It offers USB Type C Input and Output Fast Charging.

Is your phone, tablet, or laptop typically in the battery red zone before the day's end? These portable chargers and power banks give you the most boost when you're out of juice.

This is the product's overall performance score, based on key tests conducted by our industry experts in the CHOICE labs.