Sure, just follow this post steps: External battery charger for Librem5 - #48 by Quarnero. As there described, last step would include:
EDIT: @Captain_Morgan, you actually do not need to use Jumpdrive, after Librem 5 connected (under proper procedure) just use (before executing above command, before actual flash):
lsusb | grep 8M
uuu -lsusb
Also, feel free to rewrite guide (make it better) that I provided.