Powering Wio Terminal from Solar


I am attempting to power my Wio Terminal from solar using one of these - https://www.adafruit.com/product/4755

I have it set up and it is charging a Lipo battery. The output of the 4755 is ‘no more than 4.4v’ - my question is can I use it with the Wio Terminal without using a powerboost or should I be looking to add a 5v power booster or buy a LiPo Rider Pro? (when back in stock).