Review on Maxpart Inverter Outlets Cigarette Modified by Johnny Pigao

I've had mixed results with this unit. It looks very well made and easy to use. I used it to charge my DJI drone batteries from my car between jobs. One day it will work fantastic, and the next day it will not work very well at all. I still haven't figured out if this is because drone batteries are smart batteries and require a more accurate power source than they provide, or something else, but I know I can't rely on them to work every time. I think it's great for everyday household appliances, but it's not the best solution for big tasks like charging super powerful batteries for smart drones (Phantom 4 Pro).