Hi, I was wondering if anybody has experience with larger mobile energy storage systems or big batteries for on-location work. I came across this: http://www.polaroidenergystorage.com/en/polaroid-ps600/ and its siblings. To me it seems like a solid, high quality package, but I'd like to hear your opinions and of course first-hand experiences if there are any. Mainly it would recharge camera, gimbal and accessory batteries and power the lights. One of my concerns is safety with such a high concentration of energy. Also, when I'm doing photo work, I'd like to use my studio flashes with something like this. But I have no idea whether it's possible due to a very high amount of power they require after the flash. Most small generators cannot handle it, but maybe a battery can?