Cutting tool that isn"t a torch

I just took my second load to the yard, made $ 54 which was cool, but I had to leave some tin behind becuase my hacksaw and tin snips could not cut the through the light iron effectivly. What to you guys recomend for cutting light iron to size on sight,?

Battery powered Sawz-All..or I have a small generator on my trailer (tractor supply 150.00 for a 2000 watt on clearance...200.00 normally I think) and use a regular sawz-all or side grinder.

Cordless sawz-all or if you can find one cordless angle grinder.

I love my old milwaukee sawzall, and it don't take a big inverter to run it. It has paid for itself many times over.

thanks for your responses i'm leaning towrds an cordless angle grinder