RavPower's PD Pioneer 20,000mAh power bank is a really interesting proposition. Though it has two outputs, if you're using only the USB-C Power Delivery output it can ramp up to a massive 60W. We imagine there are very few USB-C laptops for which it won't suffice.

Our only concern with this laptop power bank is how much charge you're actually going to get from it for your laptop. Laptops typically have much higher-capacity batteries than smartphones and tablets, and therefore you need higher-capacity power banks in order to keep them going.

The PD Pioneer is rated at 20,000mAh, which RavPower claims will charge a 13in MacBook Pro 0.84 times. That is still a very useful amount of portable power, if lower than some examples.

A benefit of this smaller capacity is a smaller, less bulky design and, though it's still quite the brick at 369g, its rectangular design is shorter and narrower than most phones (though it is several times the thickness). It's not bad looking in its matte black shell, but it's certainly a rather plain affair, with a small indent at the top corner in which you find the ports and four LEDs that denote remaining power.

RavPower supplies a USB-C to USB-C cable in the box, which is used with the Power Delivery port, but to make use of the second 18W Quick Charge port (full-size USB-A) you'll need to provide your own cable.

Note that the PD output is also the charging input, but in this direction the juice flows at 'just' 30W. That's still super-fast, and given an appropriate wall charger can refill this bank in less than three hours.