This depends on how large is the battery size on the devices you are charging.
The HyperJuice USB-C is 27000mAh (100Wh), not accounting for power loss during power transfer.
The iPhone X has 10.35Wh battery (Can be charged about 8-9 times )
MacBook Pro 2018 has an 83.6Wh battery ( Can be chargedd 1 time)
Information on the size of the battery on your device can be found by looking at your device manufacturer's official product page or by contacting them.