Bernard mentioned batteries for drones on multiple occasions with respect to possbile usage / interest moving forward.  I found this article interesting as backdrop of the issues that the US (assume probably Canada / Europe as well) is facing in this regard....

The nationalization of supply chains is taking on a different level of import given the backdrop given the war in Russia / Ukraine / and Midde East - that may spill over and broaden...China included.

Countering China with Chinese UAVs backfires, US military faces drone shortage (msn.com)