It depends; not all drones are kamikaze-type. Great many drones are used for delivery (food, ammo, medkits), for reconnaissance, as carriers of smaller drones, and as radio retransmitters. Bomber drones also fly a large number of sorties before getting shot down or breaking down from wear.
Ground teams usually have a bunch of batteries for quick replacement, because charging is slow. With these fast-charging batteries, they may need to lug fewer batteries, and larger generators.
Ground teams usually have a bunch of batteries for quick replacement, because charging is slow. With these fast-charging batteries, they may need to lug fewer batteries, and larger generators.