I could but aren't those hundreds of bucks. This little car jump starter is only $70 and I can lift it. However, if it really only charges a few batteries it won't do. I'll look into a generator but I don't know.
@Manny D
A marine battery should keep you going all day, and you can run most chargers straight off that. But if you have a need to be flying for extended periods for commercial purposes, I'd recommend considering a fixed wing.
Alternatively, buy more batteries that fit what you have and charge them before hand or use a system that provides more flight time, a lot more, on a battery. You might also reassess your flight schedule to have a better understanding of what you will be doing and how much flight time will actually be involved. I don't know of too many outfits that fly for hours and hours that don't get set up with off site charging stations using generators and multiple chargers to keep the operation going. There are higher expenses associated with large scale operations and if you are unable to meet those costs you are likely unprepared to execute the activity.
