ok so the giant battery is in the tank, guess how big a cable would have to be? You’re not putting that on a quad
It wouldn’t have to run at full power all the time, just when actively defending against a drone. There are lots of other harder to solve issues.

Ok and? Still needs batteries and cables to withstand peak power, still needs to be tethered somehow, still needs another crew member constantly flying it. Not to mention being this close to combat and to the ground, you better have some insanely good lens protectors or that laser is gonna be out of commission after any shrapnel lodges itself in.

Completely made up idea to counter this made up idea, but if you’re putting it on armor - a 12 gauge turret sounds so much easier. Doesn’t need a shitload of power, can put it onto a generic stand/turret base, targeting is easier and you’re guaranteed to ruin the enemy drone’s life