I was thinking in the context of a landscaping company driving to a bunch of different clients’ houses and doing general cleanup and maintenance, lawn mowing etc at each one. Electric lawnmowers now have dual battery packs that you can swap between, each one lasting about an hour. I wouldn’t expect a leaf blower to be much different in power requirements. Could probably even share the same battery design with the mower.
If you’re only doing an hour or less of leafblowing per client then you can just keep swapping batteries and have spares in the van/truck. For a really big job you might need more but then you could probably ask the client if you can plug your charger into their house to charge. I think a lot of people have outdoor outlets. Otherwise you could have a charger in the vehicle.