
Charging your CellularLine THUNDER 20000 power bank fully depends on the power source you use. The THUNDER 20000 accepts the following inputs via its USB-C port: DC 5V/3A, 9V/2A, and 12V/1.5A. To estimate the charging time, consider the power bank's 20000mAh (milliampere-hour) capacity, which equates to 74Wh (watt-hours). If using a charger that provides the maximum input of 12V/1.5A (18W), you can estimate the charging time by dividing the capacity by the input power. This calculation suggests a charging time of approximately 1111 minutes, or about 18.5 hours. Keep in mind that factors such as charger quality, cable quality, and the power bank's condition can slightly affect the actual charging time. For the best performance, it's advisable to use a high-quality charger that meets the specified input requirements.


