Fueled by 24,000mAh and incredible 140W fast charging power, this device can charge your phone to laptop in a snap. For Prime ...

Example calculation: A power bank with 25,000 mAh provides around 2 hours of additional runtime with a consumption of 45 ...

For example, a phone may ask for 9V at 2A, for a total charging speed of 18W — while a laptop could demand 20V at 3A ...