Cordless tools in the trade are used a lot, myself included. The reason,? I carry 2 or 3 chargers and have a minimum of 6 to 8 batteries(all my tools are the same battery) to keep work going. I dont see ANY possibility of caring a 400 pound back up battery for your EV. Just saying.
The whole idea of electric is mis led. To charge the battery it gets plugged into a power source being generated most likely by a coal fired or natural gas power plant. Going hunting with one? Let's consider re charge while at hunting camp. I take along several 5 gallon cans to re fuel my truck...