External battery charger for Librem5

Yes it should, here is picture of ready to be used: Can't use L5 after update! - #220 by guru. As root user:
./boot-purism-librem5.sh
uuu (Universal Update Utility) for nxp imx chips – lib1.4.193

Success 1 Failure 0

2:1 3/ 3 [=================100%=================] SDPV: jump
3:1 10/10 [Done ] FB: Done

When Jumpdrive successfully executed do you see with: sudo fdisk --list (should show all your drives/partitions) Librem 5 eMMC?